perm filename E.ALS[UP,DOC]50 blob sn#294192 filedate 1977-07-18 generic text, type C, neo UTF8
COMMENT ⊗   VALID 00032 PAGES
C REC  PAGE   DESCRIPTION
C00001 00001
C00005 00002	Recent NEWS about E, newest news first.
C00014 00003	INDEX of commands.
C00031 00004	Abbreviations and explanation of E documentation.  Credits.
C00035 00005	General remarks.
C00041 00006	PAGE CHANGING, APPENDING, DIVIDING and COMBINING: XAPPEND β<ff> XMARK XDELETE
C00050 00007	WINDOW and ARROW moving commands.
C00060 00008	LINE MARKING commands.
C00063 00009	LINE-EDIT commands.
C00079 00010	Attach and Copy commands: A C
C00088 00011	LINE-INSERT mode.
C00092 00012	Handling very long lines.  XBREAK XJOIN
C00096 00013	SEARCH (or FIND) commands: F XFIND * XEXACT F<string>P F<string>:
C00112 00014	SUBSTITUTION commands: \
C00124 00015	FILE-SWITCHING and text transfering commands: ε λ H αβH ∃ ? αβ? 
C00135 00016	Justification: XJFILL XJUST XJGET XSJFILL XSJUST
C00159 00017	MARGIN CONTROL commands: XALIGN XINDENT → ← XCENTER
C00168 00018	Commands for tabular material: XTABLE XTJFILL XTJUST XTJGET
C00184 00019	Other EXTENDED commands: X<cmd>
C00208 00020	System commands to evoke E and SWITCHES permitted after filenames.
C00219 00021	Using E from a TTY (non-display).
C00228 00022	PARENTHESIS finding/matching commands: ( ) XLPAREN XRPAREN ↔ XPAREN XPINFO
C00244 00023	Swapping To and From E via RPG startups: XRSYS XRUN XGORPG XDRD XTV
C00250 00024	Message and paragraph handling commands: ∂<cmd> 0∂ !<cmd> 0!
C00262 00025	MACROS: XDEFINE Z Y XCONTINUE XABORT # XSTOPALL XSTOPONE XSTOPZERO XSTOPHOW
C00284 00026	MACROS AND COMMAND FILES: XEXECUTE PUTDEFS XCOMMENT XATTACH XREDEFINE
C00290 00027	BOOK MODE (/B) and the READ command
C00297 00028	E files extended by other programs.
C00301 00029	NEW EXTENDED COMMANDS PROVIDED MAINLY FOR TELETYPE USERS
C00303 00030	Filenames and filehacks
C00307 00031	Generating a new directory line: XNDFAIL XNDSAIL
C00312 00032	Major changes have been made to the JUST and JFILL commands.
C00320 ENDMK
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L↑]~0⊃Xv⊂10\αs (ThpfAβa%βπ πS#∃¬F.]←_y _≥⊂7w @	CiC5KISCLXAoQ∃eJAi!KrACIJ~+L¬f&N<≡F.λ_↑$Y: ↔→β di@MaP∪πβ_	,D~;@⊂λ!'f"λ90z4→y⊂:4_w⊂6 )dπQiM¬G@∃↓G##'Mβ[C@/,ε0hV≡NF∞≡X	∧Xε0w~β li@9KfAgα{7/⎇↔"ε≡&"πMtε&/LXλnE+C"AP¬⊂⊂⊂∃42P \80y2[8∧ p@=`∂'SL¬vrε|dπ&FTλλ.Nα0q`(e`λAYαK;↔M∧∧6∞r,Rε@89→$∞≠h⊂⊗[{2P 5p o`$4∃I←O8A←@9∧εFF* only the first 4 and the last 3 lines are shown.  A row of dots
	 is used to indicate that some attached lines are not shown.

  ⊗E     Deposit the attached lines where displayed and Exit ATTACH mode.
	 Note:   this command has a different meaning when one is NOT in
	 the ATTACH mode (it then means EXIT from E).  Don't stutter when
	 typing it.  Give the system time to react.
  αβR    REPLACE the attached lines in their original location and leave
	 the ATTACH mode.
  αβK    KILL the attached lines (they go away beyond recall) and exit
	 from the ATTACH mode.  Note that αK does not work.

	 If you make a practice of using the CONTROL key only, when in
	 the ATTACH mode, (when it works) you will avoid the danger of
	 accidentally killing an attachment, if you mean to hit a J or
	 an L and hit a K instead.

  ⊗C     Make a COPY of the CURRENT line and ATTACH this copy.
	 If there is already something in the ATTACH buffer when this
	 command is given then the entire attachment will be deposited and
	 re-copied.  This provides a convienent method of making 
	 multiple copies of any desired portion of text.
  ⊗5⊗C   Make a COPY of 5 lines starting with CURRENT and ATTACH these.


Relative arguments.

  Relative-argument commands add or remove lines from the end of the
  attach buffer thus:

  ⊗+⊗A    Attach 1 more line beyond those already attached.
  ⊗+⊗3⊗A  Attach 3 more lines beyond those already attached.
  ⊗-⊗A    Detach 1 line from the end of those already attached.
  ⊗-⊗2⊗A  Detach 2 lines from the end of those already attached.

  ⊗+⊗C    Copy 1 more line beyond those already attached.
  ⊗+⊗4⊗C  Copy 4 more lines beyond those already attached.
  ⊗-⊗C    Delete (kill) 1 line from the end of the attached set.
  ⊗-⊗2⊗C  Delete (kill) 2 lines from the end of the attached set.

   If the apparent position of the attached lines have been moved before
these relative-argument commands are given then additions and  deletions
are made in terms of the apparent  new location.  This gets a bit  hairy
in the case of deletions but it is a very useful device for assembling a
set of copied lines from several different places.

   Note that a single attach command is only effective to the end of the
current page, and an attachment is deposited all on the same page.

   A word of  warning,  a hazard  is involved in using ⊗A  to move lines
from page  to page.  The attached lines can be lost if the system should
crash during the interval between the removal of the attached lines from
one page  and the final  updating of the  page to which  they are moved.
This hazard can be  avoided by copying  the lines rather than  attaching
them  and  then  going  back and  deleting  the  original  copy.    This
precaution is  hardly necessary for a  line or two but it  is a wise one
when you are moving large blocks of text.

   Moving lines from page to page takes time, so don't get impatient.

   This is a good place to comment on the RIPPLING report, that you  may
have noticed in the scratch-pad lines at the bottom of the screen.  This
notice appears when a  major rearrangement of  the text between  records
becomes necessary.  This also takes time.
LINE-INSERT mode.

   While one can add text  at the bottom of a page by  simply moving the
CURRENT  marker  so  that it  appears  to  point at  the  bottom  row of
asterisks (not to dots),  a special mode is  used to insert lines  of
text at other points.  As a matter  of fact it is usually better to enter
this special  LINE-INSERT mode if one is to type several lines even when
at the end of a page.

   When in the LINE-INSERT  mode, typing a carriage return,  inserts the
carriage return into  the text, writes the line into  the core image and
enters the LINE-EDIT mode for  the next line to  be typed.  Care must  be
taken to leave the LINE-INSERT mode properly or else undesirable letters
may appear in your text.

   The fact that the editor is in the LINE-INSERT mode is signalled by a
double arrow CURRENT line marker ↔ in place of the right arrow →.  (On
Datamedias, neither the double arrow nor the right arrow is used.  Only
the terminal's cursor marks the current line.)

To enter the LINE-INSERT mode:

  αβ<cr>  Enter LINE-INSERT mode, insert a blank line ahead of the text
   or	  at CURRENT and mark the new line with the double arrow ↔.  If
  αβI	  you are in the middle of a line, this will break the line into
	  two separate lines, with the ↔ at the start of a blank line
	  between these two separate lines as newly created.  An "I"
	  will be displayed at the top of the screen to indicate that
	  you are in LINE-INSERT mode.

While in LINE-INSERT mode:

  <cr>    Accept the line and move the ↔ to a newly inserted blank line.

  α<cr>   Leave the LINE-INSERT mode and accept the line in question.

  αβ<cr>  Insert a blank line (if given at the start of a line).  If you
	  are in the middle of a line, this will break the line into two
	  separate lines, and  position the cursor to be ready to accept
	  text on an inserted blank line  between the two portions.   If
	  you are at the end of a line this will be accepted as a simple
	  <cr> as above.

  αβ<bs>  Leave  the LINE-INSERT mode  but move the →  back to  the line
	  ahead of the accepted line.

  <alt>	  Leave LINE-INSERT mode without moving the arrow.  If the
	  last line inserted is empty, delete it.
Handling very long lines.  ⊗XBREAK ⊗XJOIN

   ⊗XBREAK  will  break  lines  at  any  specified  column  position  by
inserting CRLFs.   The column  position may  be specified  by a  numeric
argument following BREAK; the default BREAK column is originally 80  but
any typed-in column argument overrides this and is sticky.  The  command
takes effect starting with the current line (as marked by the arrow)  or
with the first  line of  the ATTACH buffer  if there  is an  attachment.
Breaks occuring within a  TAB are assumed to  precede the TAB, that  is,
the TAB goes at  the start of the  text on the next  line.  There is  an
exception to this if the break is set  at 8 or less and if a TAB  occurs
at the start of a line, when the  TAB will be placed on the first  line.
The current line position is not changed by this command.

   If ⊗XBREAK is given WITH a preceding numeric argument, then that many
lines are broken (not, however, extending beyond the end of the page  or
attach buffer) and  each line is  broken as many  times as necessary  to
prevent any resulting line from  being longer than the specified  column
argument.

   If ⊗XBREAK is given  WITHOUT a preceding  numeric argument, then  the
current line (or the  first attached line) is  broken ONLY ONCE, at  the
specified (or default) column position.

   The ⊗XJOIN command joins lines without introducing spaces for deleted
CRLFs.  ⊗XJOIN will  take a  preceding numeric  argument specifying  the
number of lines to be joined (default is 2 lines).  ⊗XJOIN takes  effect
at the current line or at the  first line of the ATTACH buffer and  does
not cross page boundaries, or the end of the attach buffer.  The current
line position is not changed by this command.

   Thus ⊗XBREAK and ⊗XJOIN  can be used together  to manipulate, and  to
allow editing of, very long lines  because these commands do not  change
any text  in affected  lines except  for the  deletion or  insertion  of
CRLFs.

SEARCH (or FIND) commands: ⊗F ⊗XFIND ⊗* ⊗XEXACT ⊗F<string>⊗P ⊗F<string>⊗:

   The search can be specified in several different ways:

   1) The search can be for an alphameric  string that is separated from
the rest of the text by non-alphameric  characters or it may be for  any
string regardless  of its  surroundings.  Note  that the  FIND  commands
normally make no  distinction between  upper and lower  case, but the
⊗XEXACT command can be used to force such a distinction.

   ⊗XEXACT<cr>	  Distinguish between upper and lower case in subsequent
		  FIND commands of all kinds.  FIND commands will only
		  find string occurrences whose cases exactly match
		  those given in the search string.
   ⊗-⊗XEXACT<cr>  Do not distinguish between upper and lower case in
		  subsequent FIND commands.  This is the default.

For single-page searches the commands are:

   αβFSmith<cr>   Find just plain Smith or smith but not this string in
		  in $smith, in blacksmith or in Smithsonian.  Note that
		  % and _ are accepted as alphamerics.
   αFSmith<cr>    Find smith as an isolated word or as part of a longer
		  string (in blacksmith for example).   The string will
		  be found even where not delimited by non-alphamerics.
   ⊗0⊗F		  Type out the search string usEd in the last single
		  page search command (⊗F).  No search is done.

   Note that no space is used between the ⊗F and the start of the string.

   For multi-page saarch comma`≥ILACeJh~∀
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   ⊗0⊗XFIH
λy
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∪9λR\@↓≥↑Ag∃CeGP↓SfAI=]J\~(~∀@@↓≥←iJ↓iQChαβ↔cπ∨#3eβ}s∃↓β∨βπ∂∃εKMβK/W'K.!↓β/#←↔↔rβS#∃ε≠?7↔∞s⊃↓↓∀2&:⊃⊂h+π;"βS#∃π≠↔πK≡AβOS⊗K;≥9αα∂?7n;∪Mπ≠SπK&K;≥↓π;'S!π##∃βf+SS↔∩Zaβ∂∪∃α⊗E"⊗:⊂hS∂?7n;∪M¬;#'∂BβC↔KnKQβ7␈∪∃↓β&Cπ9β
βO';>c∃β∂FCπ∂&+I↓β&yβ∃π+O↔⊃ε3?I↓π##∀4V≠?77∞s⊃β;∞k∃1βF+;∂∃π##∃↓εs↔↔⊃ε3?Iβ&C∃↓β∨βπ∂∃π#=β7∂∪-↓βO#Mβ↔v!9↓αNq↓βSFKL4+≡O∃β&C∃↓β≡{7C3/#∃↓β≡{77πv!β;πn)↓β'~↓α~&t!1↓β↔+Q1β≡K;∂∃αβS#↔⊗)↓βπ⊗)1↓β∂ 4+C⊗+O↔;"aβ;=ε{S#↔∩↓β∂?nkπ;∪~β↔∨Ns;';:↓β←'&Aα→1ε{;3eαβS#∃∧1↓β;.+∪Mβ&y↓β(h+Sgε+⊃1β∂→
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β;?Kn1α~Lr⊃β∂}k7π;"↓βS#∂!β'LhQ↓βS/∪7';∂#↔⊃↓ε∪eβ¬α↓r∞Irβ?;3Jq↓↓α∞q↓βπ⊗;W7↔w!β7πJ↓β∃π+O↔⊃α↓#OW≡AβπLhQ↓λ≠λλ
L⊂→)%β&yβ≠'v!βS#*α;S!ε{∂∂W⊗+;∂∃αCS#∃π≠g7}a9β≡{W;S~βπM↓+	A%8hP4)↓α↓↓	R↓↓↓α6K;⊃β&C∃↓βv+cQβ}≠∂WK.s∂∃β}1↓βSF)βOSecified  by the
  last FIND  command  (whether a  single page  FIND  or a  multipage
  ⊗XFIND).  Leave the line in the LINE  EDITOR as it would be  for a
  normal FIND command  terminated by a α<CR>.  If there is something
  in the ATTACH buffer, this is interpreted as an αβ* command.   See
  below for method of using an argument.

     ⊗4α*    Find the fourth occurrence of  the string specified  by
  the  last executed  FIND  command  (whether  a single  page  or  a
  multipage  FIND) and position the cursor under the first character
  of the found string (as it would be for a normal FIND command that
  is terminated by a α<CR>).  If this command is given from the line
  editor, the argument must be typed with both control keys  (αβ) to
  force activation of the line editor.

     ⊗0⊗*    Type out the search string used in the last FIND command
  executed, and indicate whether it was a single (⊗F) or multiple page
  (⊗XFIND) command.  No search is done.

   2) The  following special symbols  may be used  in the  search string
with the  meanings noted.  If  these characters  are desired as  ordinary
characters  in the  searched-for string  they must  be preceeded  by the
identity symbol ≡.

  Symbol		Meaning

   ¬		The character that follows must not be in the string at
		this point but any other character will be accepted.
   |		Any delimiter (not one of $_% nor a letter nor a digit).
   ∀		Any character.
   ≡		The character that follows immediately after this symbol
		is not to be treated as a special symbol but it is to be
		included as a character in the searched-for string.  Use
		this to quote any of these special characters.
   ∞		Not at present implemented, but still must be quoted.
   ⊂		Not at present implemented, but still must be quoted.


   3) The action  that is to be  taken on the successful  termination of
the search  is specified by the delimiter  used to terminate the string.
The <cr>, used above,   moves the → to the  found line.  A repeat of  the
Find command,  if given, will start  with this same line,  but after the
found string,, so that multiple occurrences of a string within a line can
be found.

Many of the cursor moving commands and substantially all of the LINE-EDIT
commands may be used as the terminating action-defining delimiter.

Some of the more important action-defining delimiters are:

   <cr>     Move CURRENT to the found line or report failure.

   α<cr>    Terminate, as with <cr>, but  move the cursor until it is
	    under the first character of the string.   Note that this
	    leaves E in the LINE-EDIT mode.  A second FIND command can
	    however be given and the next occurrence will be found.  If
	    a FIND command is terminated with <cr>, a α<cr> will still
	    move the cursor to the string.

   ⊗J       JUMP the line with the found string to the top of the
	    window.

   αβ<cr>   Enter the LINE-INSERT mode with the ↔ at a newly inserted
	    blank line ahead of the found line.

   αP       Make the search over the directory page  and then display
	    the referenced page with the line pointer at the top line.
		Note that one can give this command without having to
 		give an explicit command  to go to the directory page.
		If the search fails the current location is unchanged.

   α#P      Make the search over the directory page  and then display
	    the  referenced page  with the line pointer at the second
	    occurrence of the referenced string (the first will be in
	    the first line of the page).

   ⊗:	    Make the search over the directory page and then display
	    the referenced page with the line pointer at that line
	    which contains the referenced string as a label (namely,
	    the line where the string is followed by ":", "=" or "←").

   ⊗+αP	    Just like  the command  without the  ⊗+, except that only
   ⊗+αβP    pages after the current one are search  in the directory.
   ⊗+⊗:	    This is a  very  useful  command  when a string occurs on
	    several  directory  lines  (i.e.,  on  the first  line of
	    several pages).

   ⊗A       ATTACH all lines starting with CURRENT up to and including
	    the line with the specified string.
	    If used with an EXTEND command and if the string is not on
	    the windowed page, the attachment will begin at the top of
	    the page on which the string is found.
	    Attachments do not cross page boundries.

   ⊗C       COPY all lines starting with CURRENT up to and including 
	    the line with the specified string.
	    See ⊗A above for restriction with an EXTEND command.

   αβD	    DELETE all lines beginning with CURRENT up to but not
	    including the line with the specified string.
	    See ⊗A above for EXTEND command restriction.
	    This is a very dangerous command so use it with caution.

   ⊗\       Terminate the searched-for string and prepare to accept a
            substitution string.  The substitution string is then typed
	    in and may be terminated in any one of several ways.   For
	    details see String Substitution Commands on the next page.
	    Note that there is a special repeat command for this case so
	    do not try to use the repeat conventions that are used for
	    simple searches.

   <alt>    Abort the present command and cancel the string specification.

   4) The search can be for the first  occurrence of the specified string
or for the n'th occurrence.

   ⊗3⊗Fsmith<cr>  FIND the 3rd occurrence of SMITH.

   5) The <ESC>I command will terminate any FIND in progress at the end of
the page on which it happens to be searching, and it will report this page
number.  This command is not intended for use with a single page F command
and it may give an incorrect message in this case on the termination of a
normal search.
SUBSTITUTION commands: ⊗\

String substitution commands are initiated by first giving a normal FIND
command   but  using  the   special  string   terminating  character  ⊗\
(back-slash).  This is then  followed by the substitution string  which,
in turn, is terminated by either  a simple carriage return (which may be
preceeded  by an argument, typed with control  keys) or by α<CR>.  Note,
many of  the  otherwise acceptable  Find  command terminations  are  not
meaningful with the substitution commands and are not allowed.

Please observe that an  argument before the  initial FIND command  means
find the specified  occurrence before making  the substitution while  an
argument before the  final termination means  make the substitution  the
specified number of times starting  with the initial arrow position  (or
with  the  initially  specified  occurance,  if  there  is  an   initial
argument).

The prefered method for making  repeated substitutions is to request  an
initial single substitution and  then to ask  for the desired  remaining
substitutions by the αβ\ command prefaced by an argument specifying  the
remaining number of times the substitution is to be made.

Characters in the searched-for string that are  preceeded by the special
control symbols  ¬ and ≡ and all characters  that are represented by the
special symbol ∀ or by  the symbol |  (see p. 13 for the explanation  of
these symbols)  are treated as any  other character and are  deleted and
replaced  by the substitution string.   The "partial definition feature"
as implemented in SKS is not at present available.
The | symbol  in the  searched-for string  can not  be used to replace a
carriage return.

   Note:  The  FIND command does not find  the very firsT  delimited
   string on the  line to which the cursor is pointing (unless it is
   in fact preceeded  by delimiter).  This limitation  is of  little
   consequence for  the simple FIND  but it  is an annoyance  if one
   wants  to replace  all occurances of  a symbol  (or string) which
   happens to be the very  firsT symbol (or string) on a page.   One
   can introduce  an initial  space into the  first line or  one can
   introduce an initial blank line  temporarily and have the  cursor
   at this line.   The space or line  can then be removed  after the
   substitution.

In the rest of this write-up "all occurances" means "all except the very
first character or string on the line to which the cursor is pointing at
the time  that the command  is given  when the search  request is for  a
delimited string".


Sample commands.

  αβFSTRINGαβ\"String"<CR>	  Find the first occurance of the
		string STRING,  whether typed  in  lower or upper
		case letters  and  replace it by the substitution
                string as typed, that is, enclosed in  quotes and
                with the initial letter only  in CAPS.  Limit the
                search  to the current page starting at th cursor
                location.


 αβFSTRINGαβ\"String"αβ∞<CR>	Find all occurances of the string
                STRING,  whether typed  in  lower or  upper  case
                letters  and  replace  them  by the  substitution
                string as typed, that is, enclosed in  quotes and
                with the initial letter only  in CAPS.  Limit the
                search  to the current page starting at th cursor
                location.

⊗9αβFSTRINGαβ\"String"αβ∞<CR>	Find all occurances of the string
                STRING, as above, but start the substitution with
		the 9th occurance.

   αXFIND ←αβ\ <BACK ARROW> α<CR>	 Find the first occurance
                of the character  ←  whether on the  current page
                or a subsquent one and  replace it  by the string
                <BACK ARROW>  (including  the <  and >) and  with
                spaces   introduced   before  and   after   these
                characters.    Leave  the resulting  line  in the
                line editor.

The <CR> termination is the faster mode of operation in that it does not
use the  the  line  editor  and  it is  not  subject  to  any  effective
limitation as to  the length of  lines that may  be handled.  This  mode
does have one defect  in that the substitution  is completed and is  not
subject to the simple <ALT> method of aborting a single line correction.
When the α<CR> termination is used the substitution is made via the line
editor and the results are left in the line editor's buffer so that  the
substitution may still be aborted by the usual <ALT> command.

The usual rules apply to  the specification of the searched-for  string.
The substitution string may, however, contain certain delimiters (spaces
in particular) whether or not the search is for a delimited string and a
distinction is  made between  upper and  lower case  letters.  Only  the
searched-for  characters  without  delimiters   are  replaced.   To   be
specific,  if  one  were  to  replace  a  delimited  string  by  a  null
substitution string, the  two delimiters would  remain in the  corrected
text.

Currently, substitution cannot be done for the CR (or LF) at the end  of
any line of text.   A warning message  will be isssued  when you try  to
make such  a  substitution.   Also,  no substitution  can  be  done  for
pagemarks (formfeeds).

The substitution string is sticky, so that a substitution  command, when
successfully executed  for a single  occurance, may be repeated  for the
next  occurence by typing αβ\ only.  The typing of  a new string for the
searched-for  string  destroys  the  record  of   the  previously  saved
substitution string  and the entire request must  be retyped before this
command will be honored.

A  null  substitution   string  may  be  used  and  no  longer  reguires
confirmation.

Multi-page substitutions  are useful  but potentially  dangerous as  the
substitutions made on  any one page are, of course, written out onto the
disk file when ever a new page is entered.

As noted earlier,  typing αβ\  after a legal  substitution command  will
repeat the substitution.  This command  may be preceeded by an  argument
(with control bits) and the substitution will be repeated the  specified
number of times.  Should substitutions occur on more than one page,  all
substitutions on pages earlier than the last page will have been written
out.

The use of the  command α\ rather  than αβ\ is also  allowed but is  not
recommended.  This leaves the altered line  in the line buffer with  the
possibility of an <ALT> abort.

Sample repeat commands.

   αβ\		Repeat  the previously made substitution  at the next
                occurance of the searched-for string using the faster
                and  safer mode which  does not leave  the results in
                the line editor buffer.

   αβ6αβ\	Repeat the substitution for the next 6 occurances.

   α\		Repeat the substitution once but leave the results in
		the line editor buffer.

   ⊗0⊗\		Type out the search and substitute strings last used
		in a substitute command, and indicate whether it was
		a single or multiple page substitute command.
FILE-SWITCHING and text transfering commands: ⊗ε ⊗λ ⊗H αβH ⊗∃ ⊗? αβ? 

The file switching commands ⊗ε and ⊗λ cause E  to close the current file
being edited (writing out the current page if necessary) and then to ask
for the name  of another file  to be edited.   That  file is opened  for
editing, with any ATTACH buffer  maintained while switching files.  Thus
you  can  switch back  and forth,  editing  different files,  and easily
moving or copying text from one file to another  simply by attaching the
lines desired.   The ε command (ENTER) opens the  new file in read-write
mode while the λ command (LOOK) opens the file in read-only mode.

   All of the  usual switches may  follow the filename typed  with these
commands; for example, you  can use /8P to go to page 8 in the new file,
/E to go to the end of the file, /N to open the new file in no-directory
mode, /C to create  the file you want to switch to, etc.  See  p. 20 for
more details.

   As different  files are referenced,  each file  is assigned a  number
which  can be used thereafter  as an argument  to the ε or  λ command to
call the desired file without retyping its name.  When files  are called
by number, the command (e.g., ⊗2⊗ε or ⊗1⊗λ) does  not ask for a filename
and the  file is positioned at  the last referenced page  and line.  Any
previously existing line marks are also restored.

   Eight different files may  be so referenced.  Should  one reference a
9th  file, the  least-recently-used file  in  the list  is automatically
replaced by  the newly  referenced file.   The  user is  warned of  this
replacement.

   The list  of files with their referencing numbers can be displayed as
a mnemonic aid by the command ⊗∃.

   The previously referenced  file (unless it  be the E-manual  file) is
considered to be the HOME file and can be switched back to by typing the
⊗H  command.   The  home file  is  reopened in  its  previous read-write
condition and at the last referenced  page and line.  On returning  from
the  E-manual file  (see below)  the home  file conditions  that existed
before  going to  the E-manual  are reestablished;  that is, if  you had
switched from  file A  to file  B  then to  the E-manual,  the first  ⊗H
command would  return you to file  B and the next ⊗H  command would take
you back to file  A.  Repeated ⊗H  commands thereafter would switch  you
back and forth between file A and file B.

   The HOME command will accept an argument to override the default page
at  which the file  will be opened;  an absolute  argument specifies the
number of  the page  at which  to open  the home  file,  and a  relative
argument (e.g.,  ⊗+⊗2) specifies the  relative number  of pages to  move
from the last referenced page in the home file before opening it.

   Finally it is possible to reference the E-manual file, E.ALS[UP,DOC],
by typing the ⊗? command.  The first reference to this manual will be to
page 2  which  contains  information  on recently  made  changes  to  E.
Thereafter the  manual file is  opened at  the last referenced  page and
line.  One may, however, override these default values as in the ⊗H home
command by  typing  an  absolute or  relative  argument to  specify  the
absolute or relative number of the page to be opened.

Difficulties may be experienced in  copying and moving information  from
unformatted files  and from  files without  directories particularly  if
many lines are to be moved.   Requests if files may be formatted  should
be honored usually unless this is  known to be undesirable.  E is  smart
enough to detect most cases when one tries to format a binary file or an
XGP file and it will  tell you this and give  you another chance to  say
NO.  If one  attempts to move  information TO an  unformatted file,  the
material in the ATTACH buffer may be lost.

Commands

⊗ε<file name><cr>  Close the current  file and open  the specified
        file in read-write mode.   The usual switches /#P, /#L and
        /C may be used.The new file is assigned a serial number by
        which it  may  be called  later.    (The initial  file  is
        numbered 0).  When called by number the display is returned
	to the last referenced page and with the arrow on the last
	referenced line and all previously set line marks restored.

⊗3⊗ε    Reopen the file assigned the serial mumber 3 in read-write
        mode.  Note that no carriage return is used in this case.
	Return the display to the last referenced page.  Return the
	arrow to the last referenced line and restore all previous
	line marks.  (Use the ⊗∃ command, below, to find numbers).

⊗λ<file name><cr>  Close the current  file and open  the specified
        file in read-only  mode.  The  usual switches /#P  and /#L
        may be used.   The new file is assigned a serial number by
        which it  may  be  called  later.   (The  initial  file is
        numbered 0).

αβ3⊗λ   Reopen the file assigned the serial mumber 3 in  read-only
	mode.

⊗∃      List the previously referenced files with their serial
	numbers.  For convenience the letter H accompanies the number
	in the listing of the "HOME" file and a "]" is used rather
	than a ")" for the file currently being edited.

⊗0⊗∃	Move the current-file listing to location zero and flush
	all other listings (to make room for more).

⊗H      Return (HOME) to the last referenced file.  The E-manual
	file is not considered a HOME file.

⊗2⊗0⊗1⊗H  Return (HOME) to the last referenced file on page 201.
	The E-manual file is not considered a HOME file.

⊗-⊗2⊗3⊗H    Return (HOME) to the last referenced file on a page
	that is 23 pages earlier than the last referenced page.
	The E-manual file is not considered a HOME file.

⊗?      Close the  current   file  and  open  the  E  manual file
	E.ALS[UP,DOC]  on page 2,(for changes) or, if it has been
	referenced earlier, to the last referenced page and line.
	page and line.

⊗1⊗?	Close the  current   file  and  open  the  E  manual file
	E.ALS[UP,DOC]  on page 1, the directory page.

⊗8⊗?	Close the  current   file  and  open  the  E  manual file
	E.ALS[UP,DOC]  on page 8.

⊗-⊗2⊗?  Close the current  file  and  open  the  E  manual file
	E.ALS[UP,DOC] at 2 pages before the previously referenced
	page.

Justification: ⊗XJFILL ⊗XJUST ⊗XJGET ⊗XSJFILL ⊗XSJUST
    (See p. 17 for ⊗XALIGN, ⊗XINDENT, ⊗XJCENTER)
    (See p. 18 for ⊗XTJUST ⊗XTJFILL ⊗XTABLE and ⊗XTJGET)

    ⊗XJFILL and ⊗XJUST are basic justiification commands.  There is now no
effective limit  to the  length of  lines  that may  be handled  by  these
commands.  It is always wise to do  a αβ.  before using these commands  so
that one can undo their effect by using the ⊗XCANCEL command if necessary.

    The margin justifyIng command ⊗XJFILL  allow one to adjust the  length
of textual lines by moving words from line to line as required to  achieve
any desired maximum line  length.  At the same  time this command  permits
the left margin to be fixed at any desired position (both for crown lines,
i.e.  first lines of paragraphs, and for normal text lines), and it allows
one either to preserve blank lines  at each paragraph break or to  specify
the desired number of  blank lines preceding  each paragraph.  The  ⊗XJUST
command also pads the line by distributing additional spaces between words
so as  to  align  the right  margin  as  well.  Both  commands  allow  the
preservation of two spaces after sentences which are terminated by any  of
the characters .?!:  provided two  spaces (or a CRLF) originally  followed
such a character.

    The range  of  application of  these  commands  may be  limited  by  a
prefixed decimal argument.  If no argument is specified the entire page is
justified.  If  there is  an  attachment the  ATTACH buffer  is  justified
rather than the page.   When the range is  limited by a positive  argument
the justification starts with the arrow line while for a negative argument
the justification will be  for the specified number  of lines before  (but
not including) the arrow line.

    ⊗XJFILL or ⊗XJUST, preceded by a 0 argument, causes E simply to report
the current status of the switch setting (see below) and of the  resulting
margins without any overt action other than to record any typed changes to
these values (these changes are recorded before the report is made).

    The basic commands will accept a following string (separated from  the
command itself by a space) which  may contain a (single letter) switch,  a
space, and a following string of decimal numbers separated by commas.  The
values specified  in this  following string  are sticky  and nee`λ@A9←h@A	J~∃e∃isaK⊂A←\A∧AgkEMKckK9hAkg∀A←L@↓iQJA	CgSF↓G←[[¬]IfA%LAiQ∀AgC[∀@AaCIC[Ki∃ef~∃¬eJAI∃gSeK⊂\@A∪_A←]YdAg←[∀A←LAQQJ@A¬eOk[∃]ifA¬eJAi<AEJA
QC]O∃HXAi!K\@A=]Yr~)iQKg∀ACeOU[K]iL@A]K∃H@AE∀@AisAKH@A]SiP@↓C]r@↓[Sgg%]N@A9k[Ke%GCX@↓CeOk5K]if4∃S]I%GCiK⊂AErA
←[[CLA←]Yd\~∀~(@@@AQQJAg]SiGP↓YKii∃d@ASLAkgK⊂Ai↑@↓gaKG%MrAi!JAG←9ISiS=]f@AQQChA¬eJAi<@AEJ4∃iCW∃\AS\↓iQJA=eSOS9CXAi∃qh@AQ↑AS]⊃SGCi∀AaCe¬OeCa!fXAC9H@ASPA[Cr↓EJA←9J@A←_~∃iQ∀AM←Y1←oS]≤XA≤X↓∞XA$0@A←d↓α\@AQQJA≤QM←dA≥←e5CXRAMoSiG ASfAQQJ@A%]SiS¬X~∃I∃MCkYPAgoSQGP\~(~∀@@A¬YC9VAYS9Kf@@!YS]KLAiQCP@AG←9iCS\↓≥≡@A
QCeC
iKef0A]←hAKmK8AgaC
Kf@A=d~∃)¬¬fRA¬eJAC1oCsfACggU[KHAQ↑@A[∃C\ABAaCe¬OeCa AIKm%gS←\@QM←HACYXAgoSQGP~∃MKiiS9OfR\4∀~∀@@A/SQPAiQ∀A≤Ag]SiGP↓←aKe¬iSmJ0@AC]dAYS]∀AiQCPASf@↓S]IK9iKHA	r@dA=d@A[=eJ~∃MaCGKLASfA¬Yg↑A¬ggk[∃fAi↑↓EJAB↓Ge←o8@AYS9JXAi!ChASLXAi↑↓EJAi!JAgi¬ehA←_@AB~)]KnAACeCOICaP\@A)Kah@Ao%iQ←kPAEYC9V@AY%]Kf@↓EKio∃K\Aa¬eCOe¬aQf@↓C]H@↓oSiP4∃ISM→KeK]PAS]I∃]if@↓kgKHAM←d↓ISMM∃eK]hAGe←]\@AY%]KfA5Cr@A9←n@A	J@AQ¬]IYK⊂~∃oSQQ←kh↓ISMM%GkYid\~∀~(@@@A	rAga∃GSMs%]NAB↓goSi
PAYKQiKdA=iQKdAiQC8A≤XA=]JAG¬\A]←\AUkgQSMr@↓iKqh4∃iQCPASf@↓]←hA%\@@E9←e[C0DAM←IZX@A→←dAKaC[aY∀X@Ao%iPAGI←o\@↓YS]KLAiQCP@ACe∀~∃S]⊃K]iK⊂AYKgLAiQC8@AiQ∀A]←e5CXAS9IK]hA←LAQQJAE=Ir@A=LAiQ∀AaCe¬OeCa!f@AC9H~∃o%iQ←kPAgKa¬eCiS9NAEY¬]VAY%]Kf\4∀~∃']SiGQ∃f~∀~)≤@@AQQJA≤↓goSi
PAGCUgKf@↓
@Ai<AeKG=O]Su∀AC]r↓S]IK9hAOe∃CiKd↓iQC\b@AC9H←←d4∀@@@↓iQJAAeKgK9GJA←_ABAE1C]VA1S]JA¬fAEK%]NAB↓Ge←o8AYS]∀AS]I%GCi←H\@A)!SfASL~∀@@AiQJ↓goSi
PAi↑↓kgJ@↓k]IKHA]←e5CXAG=]ISi%←]fA]QK\@↓iQJA	←IrA=LAiQ∀@AiKah~∀@@@Q]=\[Ge=o\AY%]KfR↓SfA]=hAS]⊃K]iK⊂\@@A%hAG←IeKga=]IfA→CSeYdAGY←MKYr@↓i↑~∀@@Ai!JA←Y⊃KdAM=eZA←_AiQJ↓Ukgi%MrAG=[[C]⊃fAC]⊂AQK]
JASh↓QCfA	KK\A5CIJ@↓iQJ~(@@@A%]SiS¬XAIK→CkYh↓goSi
P\~∀4∃∞@@↓)QJA≤AgoSQGPAG¬kgKfA
@AQ↑AgG¬\AiQ∀AgaK
SMSK⊂AgKGQS←\A=LAiQ∀AiKqPAiQCP~∀@@ASfAQ↑AEJ↓Ukgi%MSKH↓C]HAQ↑AIKQKe[S9JAMe=ZAiQ%fAiKahAiQ∀AS]I∃]hAi!ChAQ¬f~∀@@AEK∃\Akg∃H@Ai<ASIK9iSMrAiQJ↓Ge←o8@AYS9KfAS8@AiQ∀A←eS≥S]CXAiKqP\@@AQQJ~∀@@AaIKgK]
JA←L↓iQSfAS]I∃]hASLAiQK8@Akg∃HAIkIS]NAQQJ@A)kgiS→SGCi%←\ACL@AB~(@@@A
e←o\↓YS]J↓gSO]¬X@QB↓EYC],AYS]∀@ASf↓giSY0AeKG=O]Su∃HAKm∃\AoSQQ←khAiQJ4∀@@@↓SIK]QSMSK⊂AGe←]\AS]⊃K]hR8@A)Q%fASf↓iQJAMoSiG Ai↑AUgJAo!K\As=jAoSMP@Ai<~∀@@AUkgQSMrAM←[JAQKqhAQQChA!CHXA¬h@Ag=[JAi%[JAS8AiQJ↓aCgh$AEKK8@AUkMiSMS∃H~∀@@AS]Q↑Ag←5JA]←8[]←e5CXAM=eZAC9HAs←TACeJ↓oSYY%]NAi<AYKhA
@A⊃KiKe5S]JAQQJ~∀@@AG=]ISi%←]fA→←dAs=j\~∀
    Care must be used with this switch to be sure that  E  will be able to
identify the crown indent  correctly.  The procedure  used is as  follows:
The text  to be justified  is first  scanned to  locate a blank line.   If
one is found then the  next non-blank line is assumed  to be a crown  line
and its indent is stored as  the desired identifying indent.  If no  blank
lines are found within  the specified text then  the indents of the  first
two lines are determined.  If these two values are not the same the  first
line is assumed to be a crown line.  If the first two line indents are the
same these lines are taken to be non-crown lines and the rest of the  text
is scanned for a line with a different indent and if one is found this  is
taken as the desired crown indent indicator.  The practical effect of  all
of this is that one should not start the justification with a line that is
the last line of a paragraph, but then doing this is quite meaningless  in
any case.

R   (Rejustify) The R switch causes  E   to take the last specified  crown
    indent as the crown  line indicator for  the new justification.   Note
    that this  switch is faster and  safer than the  G switch as the  text
    is not scanned.  This is the switch to use to rejustify text that  you
    have already justified into some non-normal form when either you  have
    made some additional corrections to the text or you have decided  that
    you want the format changed in some way.  Note that it is possible  to
    make changes to the text between the two justifications without having
    to indent any  added non-crown lines  to the precise  amount that  was
    used in  the  original  text.   Added lines  that  are  to  start  new
    paragraphs must, of course, be indented by the correct amount or  must
    be preceded by blank lines.  If the  format is not to be changed  then
    the the previously specified indents need not be retyped.

A   (Assigned) The A switch causes  E  to use the Assigned conditions  for
    the new justification.  This is the switch to use if you have  already
    established the A input  conditions or if you  want to establish  them
    yourself and you then want to justify additional text.  This switch is
    also useful  if you want to have  E  disregard input text indentations
    and to use blank lines only for new paragraph signals.  This last case
    can be achieved initially by simply specifying the A switch.   E  will
    disregard indentation conditions in the input text and take all lines,
    that are not preceded by a blank line, to be non-crown lines, if the A
    values are both the same.  The initial default values are set at 0,0.

There are four quite different ways to establish the A values.  These are:

    1) By  typing.  A  vertical bar  "|" after  a number  in the  suffixed
string means that the number is an  A value.  For example, 0|4,5|2 as  the
string means that lines in the original  text with an indent of 0 will  be
taken to  be  crown  lines  and  these lines  are  to  be  indented  4  on
justification and  that the  initial non-crown  lines are  expected to  be
indented by 5 and are  to be indented 2  on justification.  Note that  the
exact value of 5 has  no significance since the  crown line indent is  the
determining factor.  The  exception is  when the  old text  uses the  same
indent for both  crown and non-crown  lines and depend  on blank lines  as
paragraph indicators.  If this is the case then, as noted above, all lines
are taken to be  non-crown lines, regardless of  their indent, as long  as
they do not follow a blank line.

    2) By using the G switch  with the justifying command and  letting   E
establish the input conditions.

    3) By  using the  ⊗XJGET command,  described below,  to cause   E   to
determine the conditions used in  the text.  This command actually  stores
these conditions as the conditions to be produced rather than as the input
conditions but then one uses the  R switch with the justification  command
and this copies the conditions previously stored as output conditions  and
uses them as the input conditions.

    4) By having  already justified the  text at an  earlier time and  not
having otherwise  changed the  stored  justification parameters  and  then
using the R switch with the new command.

   Typical command strings.

⊗XJUST<cr>      Justify the  current  page (or  the  ATTACH buffer  if  in
		ATTACH mode) using the  default values for all  parameters
		that might be specified by a string following thee command
		name.   These  default  values  are  initially  set  at  N
		0,0,74,-1, the N  signifying the  Normal switch  is to  be
		used which accepts any indent greater than 1 as well as  a
		blank line  to  signal a  new  paragraph.  The  string  of
		decimal numbers (reported  as P,L,R,B)  indicate that  the
		paragraph or  crown  indent  is  to  be  0,  the  left  or
		non-crown indent is  to be 0,  the rightmost character  is
		not to go beyond column  74 and the distribution of  blank
		lines is to be the same in the resulting text as found  in
		the original text.


⊗XJU 0,4,66,0<cr>  Justify the current page or the ATTACH buffer using the
		indents and right margin as specified and leaving no blank
		lines between paragraphs.  The crown lines will all  start
		with 0 indent and the left indent for the rest of the text
		will be 4.  The last occupied column will be 66 and  there
		are to be no blank lines between paragraphs.

⊗XJFI R 10,10,,1<cr>  JFILL (left margin only) the current page which  has
		been justified, perhaps  by the preceding  command, The  R
		switch tells  E  to take  the former output parameters  as
		those that are to be  used to identify crown lines.   Note
		that this command calls for the indents of all lines to be
		the same and that  paragraphs are now  to be separated  by
		single blank lines.
		
	Three new commands have been added for use with normal text.

⊗XJGET

    The ⊗XJGET command  causes  E  to  scan the specified  section of  the
text and to determine the indent values that were used for crown lines and
non-crown lines and the  column position of  the rightmost character.   It
stores these as sticky values for  these parameters and these values  will
then be  used should  a ⊗XJUST or ⊗XJFILL  command be  subsequently  given
without suffixed arguments.  The action  is quite analogous to that  taken
when the G switch is used with a ⊗XJUST or ⊗XJFILL command except that the
values found are stored as the  conditions to be produced on a  subsequent
justification rather than as  the expected conditions to  be found in  the
original text.  This  command always resets  the B value  to its  original
default value of -1, that is for there to be the same arrangement of blank
lines in the justified text as are found in the original text.

    By using this  command one  can redetermine the  parameters that  were
used when  the text  was  justified, presumably  at some  earlier  editing
session or perhaps by someone else and  one can do this without havine  to
make the determination by visual inspection.  Note that this command  does
not take suffixed arguments.

    The task  of rearranging  sentences within  a paragraph  or of  moving
sentences from one paragraph to another  is simplified by the use of the
following commands.

   ⊗XSJFILL	The ⊗XSJFILL and ⊗XSJUST  commands separate all  sentences
     and	in the  specified text  so that  they all  start with  the
   ⊗XSJUST	non-crown  indent,  and  then  the  individual  lines  are
		⊗XJFILLed or ⊗XJUSTified.   As a consequence  paragraphing
		information as shown by an indent is lost but blank  lines
		are  preserved.   These  commands  will  accept   suffixed
		arguments which are stored  as sticky parameters prior  to
		the execution  of  the command  and  which then  apply  to
		future uses of these commands or of the normal ⊗XJFILL and
		⊗XJUST commands.
MARGIN CONTROL commands: ⊗XALIGN ⊗XINDENT ⊗→ ⊗← ⊗XCENTER
	(See p. 16 for ⊗XJUST, ⊗XJFILL, ⊗XJGET, ⊗XSJUST and ⊗SJFILL)

   These  commands  preserve  the  identity  of  the  text  lines  while
preforming certain operations on their left margins.

   ⊗XALIGN moves all lines defined by the location of the arrow line and
a prefixed argument  (with 1  line or the  entire ATTACH  buffer as  the
default option) so that  all lines start with  a specified (or  default)
indentation.  The command uses initial TABs to the extent possible.  The
command can take a single suffixed decimal (sticky) argument to  specify
the desired indentation.  The initial default value is set at 0.

   The command ⊗XALIGN  may be set  to operate in  one of two  different
modes with  respect to  the  treatmant of  interior TABs.   The  initial
default mode is for all interior  TABs to be replaced by the  equivalent
number of spaces that they  produced before the alignment was  effected.
The other mode is entered by typing the letter T (for TAB) as a suffixed
letter (after the command name and separated from it by a space).   This
mode leaves all  interior TABs  untouched.  The  mode as  so changed  is
sticky and applies for  all subsequent ALIGN  and INDENT commands.   The
initial default  mode  may be  restored  by  typing the  letter  S  (for
spaces).

   INDENT simply moves the specified  number of lines (default value  of
1) except when in the ATTACH mode  when it is the entire ATTACH  BUFFER)
to the  right or  left  by the  specified  amount independent  of  their
original starting positions.  This  permits blocks of  code to be  moved
right or  left while  preserving their  original relative  indentations.
INDENT will takes one suffixed numerical argument specifying the desired
indentation, (a positive number if to the right or a negative number  if
to the left).  Motion to the left is limited by the edge of the page but
there is no practical limit to the motion to the right so take care when
changing the indent value.  The initial default indent value is 4.

   The command ⊗XINDENT may  be set to operate  in one of two  different
modes with  respect to  the  treatmant of  interior TABs.   The  initial
default mode is for all interior  TABs to be replaced by the  equivalent
number of spaces that they  produced before the alignment was  effected.
The other mode is entered by typing the letter T (for TAB) as a suffixed
letter (after the command name and separated from it by a space).   This
mode leaves all  interior TABs  untouched.  The  mode as  so changed  is
sticky and applies for  all subsequent ALIGN  and INDENT commands.   The
initial default  mode  may be  restored  by  typing the  letter  S  (for
spaces).

   The commands ⊗→ and  ⊗← are special cases  of INDENT.  They move  the
specified lines to the right or  left by the (absolute) amount that  had
been set  previously by  the ⊗XINDENT  command.  The  default number  of
lines is one if not  in ATTACH mode or it  is the entire ATTACH  buffer,
and the initial default indentation is 4.  Unlike ⊗XINDENT, these  arrow
commands do not require a ⊗X  or a carriage return.  Like ⊗XINDENT  they
limit the text motion to the left  edge of the page.  These commands  do
not take suffixed arguments.


Typical commands.

⊗XALIGN<cr>     ALIGN the  earrow  line (or  entire  ATTACH buffer  if  in
		ATTACH mode)  with  all  lines moved  to  start  with  the
		default ALIGN indentation (originally set to 0).

⊗4⊗XALIGN 5<cr>  ALIGN 4 lines starting with  the arrow line (or with  the
		start of the ATTACH buffer if in ATTACH mode) so that they
		are indented by 5.

⊗XINDENT<cr>    INDENT the arrow line (or  the entire ATTACH buffer if  in
		the  ATTACH  mode)  by  the   default  value  (set  to   4
		initially), but do not let any line move far enough to the
		left to lose any non-space characters.

⊗8⊗XINDENT 3<cr>  INDENT 8 lines starting with CURRENT by 3, that is, move
		the 8 lines  to the  right by  8 positions,  with the  new
		default value being set to 3.

⊗6⊗XIND T 3<cr>  INDENT 6 lines, starting with the arrow line, by 3  after
		changing the mode so that interior TABs are kept as TABs.

⊗6⊗XINDENT -3<cr>  INDENT 6 lines  starting with CURRENT  by -3, (that  is
		move them to the left by 3 positions).


⊗→              Move the CURRENT line or the ATTACH buffer contents to the
		right by the previously established amount.

⊗←              Move the CURRENT line or the ATTACH buffer contents to the
		left by the previously established amount.

⊗6⊗→            Move 6 lines starting  with the CURRENT  line or with  the
		start of the ATTACH buffer to the right by the  previously
		established amount.

   ⊗XCENTER centers all lines defined by the location of the arrow "line
and a prefixed argument (with 1 line or the entire ATTACH buffer as  the
default option) so that all lines are individually centered between  the
left and right margins as previously specified for the ⊗XJUST or ⊗XJFILL
commands, or desired values may be typed with the center command  itself
and these new values will then be the default values for the ⊗XJUST  and
⊗XJFILL commands.  See these other commands for full details.

   The command uses initial TABs to the extent possible.  Interior  TABs
are replaced by spaces before the centering is effected.
Commands for tabular material: ⊗XTABLE ⊗XTJFILL ⊗XTJUST ⊗XTJGET

    Four new commands have  been added that permit  one to handle  tabular
material in a manner analogous to way in which normal text can be treated.
These commands take switches just as do the normal justification commands.

    Two types of commands are provided to take care of the two classes  of
input data that are most apt to be encountered, these being:

A)  Tabular material that is in proper columnar alignment but that may have
    missing entries.

    The ⊗XTABLE command is intended for use with such material.

B)  Tabular material that  may not  be in proper  columnar alignment,  but
    where the  entries are  separated by  at least  2 spaces  or by  TABs.
    There may also be normal text associated with each tabular line  which
    is to be justified.  Of course, in  this case there can be no  missing
    entries.

    The ⊗XTJFILL and ⊗XTJUST commands  are intended  for use  under  these
conditions.

   These new Tabular  commands require the  specification of  additional
values in addition to the P,L,R,B  values specified with the ⊗XJUST  and
⊗XJFILL commands.  Of course, just as for these older commands,  default
values may be used and only those values that are to be changed need  to
be specified.  Switches and  margins are specified  as usual (with  some
restrictions which will be described later).

   When new tabular-field values are to be typed, these must start  with
a semicolon ";"  and they  are to be  separated by  commas.  Values  not
otherwise marked  are taken  to be  field lengths,  that is  the  string
;5,8,9<CR> is taken to mean that there are to be three columns the first
one starting with an indent as specified by the P value and with a field
length of 5  character positions,  this is to  be followed  by a  second
field of  8 character  positions, then  one with  a field  length of  9.
These values  supercede  the  field lengths  that  had  previously  been
specified for the first three fields and if still additional fields  had
been specified these are to be retained and shifted to the right or left
as may be required because of the changes to the first three fields.

   When specifying  changes in  fields,  it is  only necessary  to  type
numbers for  those  fields  that  are to  be  changed  and  to  indicate
preceding fields  by  commas.  Fields  after  those typed  are  retained
unless the  typed-in string  is followed  by the  letter Z  (for  zero).
Should there be more fields specified for output than are specified  for
input, E warns  the user at  the time of  execution of the  TABLE or  TJ
command and  ignores the  extra  fields; should  there be  fewer  output
fields than input fields, the command is aborted.

   When several fields are to have  the same length these fields may  be
specified by the use of the @  sign, thus 9@5,7 means that there are  to
be 9 fields of length 5 followed by a field of length 7.  Fields to  the
left of a field that  is to be changed may  be indicated that are to  be
left the skipped by  the use of commas  without numbers, thus ,,7  means
leave the  first two  columns unchanged  and make  the next  one with  a
length of  7.   Similarly  4@0,3@5  means  leave  the  first  4  columns
unchanged and make  the next  3 columns with  lengths of  5.  Note  that
zero, in this case, does not mean  a column of zero length but means  no
change.

   Fields must have widths of 3 or more to permit a single character and
to allow for there to be two spaces between the characters in  different
columns.  Should  any  particular  entry  be  too  long  for  the  width
specified, the next entry is automatically  moved to the right so as  to
preserve the  desired separation  between  columns.  Such  excesses  may
propagate.

   Since the N switch has little  meaning for ⊗XTJ commands the  default
switch for these commands is  the G switch.  Care  must be taken to  see
that the arrow line  is properly located with  respect to the text  when
this commend is  given as it  is much less  easy to correct  erroniously
assigned input conditions for tabular  material than it is for  ordinary
textual material.  Please see the explanation of the switches on page 16
before attempting to use any of the ⊗XTJ commands.

   A fourth  command  ⊗XTJGET has  been  provided to  perform  the  same
function for tabular material that is performed for ordinary text by the
⊗XJGET command.  It should be noted that this command must determine the
positions of each column as well as  the left margins and so it must  be
given when the  designated text is  restricted to start  with a  tabular
line in which there are no missing entries.

Note: The ⊗XTGET command does the same thing as ⊗XTJGET.
	

The specifications for these new tabular commands will be listed below.

⊗XTABLE 

   This command must be  given either 1) with  the G switch (see  below)
operative, 2) after a  prior execution of the  ⊗XTJGET command and  then
with the R switch operative, or 3) after a properly executed command  or
set of commands as specified by 1 or 2, as just described, and then with
the A switch operative.  In effect, one must provide E with  information
as to the existing state of the input textual material since there  does
not exist any "Normal" set of conditions that can be assumed.  While, in
principle, it is possible to provide  this information by typing it  in,
it is thought that this task can best be handled by E.

   Information regarding the  desired new format  must also be  provided
and this will  usually be  done by typing  the needed  information as  a
suffixed string as described below.   This information is sticky and  it
need not be retype.  If there  exists a sample of tabular material  that
is already in the desired format even this second task may be left to  E
by again using the  ⊗XTJGET command as explained  below.  Note that  the
⊗XTJGET command changes the parameters as they relate to the  conditions
to be established, while the G switch changes the parameters relating to
the input text.

   This command will  accept a  prefix argument defining  the number  of
lines to be  processed and  a series  of suffixed  arguments similar  in
every respect to  the syntax used  with ⊗XFILL and  ⊗XJUST.  One  enters
information as to the desired tabular fields by then typing a  semicolon
";" followed  by a  series of  decimal numbers  which define  the  field
lengths to be used.  If several fields are to be all the same length the
syntax, 5@7 for example, may be used meaning in this case that there are
to be  5 fields  of  7 characters  positions  each.  Alternately  it  is
possible to define a field in terms of the lastcolmnar position that it
is to occupy by prefacing the number with an exclamation mark "!".  Note
that it is not possible to specify the starting column as this is set by
the cumulative lengths of the preceding fields.

   For example, the command  αβ7αβXTAble 4;10,6@5,!60<CR> would  specify
that there be 8 fields with the first one occupying 10 columns  starting
at an indent of 4 then there are to be 6 fields each occuping 7  columns
and a final  field ending at  column 60.  The  starting indent for  this
last field is obtainable by adding up the columns already accounted  for
(44) and so the last  field is to be 16  columns wide.  Note that it  is
only necessary to  type a  single number  before the  semicolon as  this
commands starts all lines with the  crown or new paragraph indent.   The
normal left  margin indent  is not  used and  the program  automatically
determines the right margin value from the accumulated column count.

   This command requires information  as to the  existing format of  the
data to be  reformatted and information  as to the  desired new  format.
The old format can most  easily be obtained by  using the G switch  with
the command.  The new format imformation  can then be typed in with  the
⊗XTABLE command or  it my also  be obtained from  an existing table  (or
portion of a table) that is already  in the desired format by using  the
⊗XTJGET command.


⊗XTJFILL and ⊗XTJUST

   As mentioned earlier  these commands  are for use  with tabular  data
that have no missing entries but do have with them some associated  text
that one wants justified.  The  listings of commands with  explanations,
as used in  this manual is  an example of  such material.  The  original
material need not be aligned into columns.

   The methods for specifying the  various parameters is similar in  all
respects to that described for the ⊗XTABLE command.  Especial care  must
be used in  establishing these  parameters particularly  as regards  the
number of  fields.  The  signal  for a  new field  is  taken to  be  the
presence of 2 or more spaces between entries (3 spaces if the entry ends
with  a  sentence-terminating  punctuation  mark)  and  if  the  textual
material has already been justified and padded there may be cases  where
these conditions  are  met  in the  associated  textual  material.   The
program differentiats between these entirely on the basis of the  number
of tabular entries that are expected and that have been found.

   CAUTION: It is unwise  to use ⊗XTJUST  on text that  one may want  to
re-⊗XTJUST or ⊗XTJFILL later, since any additional spaces at word breaks
which the first  ⊗XTJUST introduces  will be  taken as  a tabular  field
indicators during the execution of the subsequent commands.


⊗XTJGET

   A new  command ⊗XTJGET  IS  also available  to determine  the  margin
values of  a designated  portion of  text in  a manner  similar to  that
discribed for the G switch above but it causes these data to be store as
the margin values  that will be  used for subsequent  ⊗XJUST or  ⊗XJFILL
commands.
Other EXTENDED commands: ⊗X<cmd>

   Certain commands are potentially too dangerous to be safely evoked by
a single character.  There are also  more commands than can be  obtained
with single characters.  These contingencies  are handled by the  EXTEND
command specified as follows:

   ⊗X     Accept the string which follows as a command.  This
	  string may be abbreviated  as long as no ambiguity
	  results.  The string must be terminated by a space
	  if parameters are required,  or  by a <cr> or some
	  other delimiter.

   EXTEND commands.

   ⊗XALIAS <project>,<programmer>
		This command can be used to change your alias  PPN.
		It takes a following  text argument in exactly  the
		same form as the system  ALIAS command:  1) PRJ  to
		set project  to PRJ  and  programmer to  logged  in
		name, 2)  PRJ, to  set project  to PRJ  and  retain
		previous alias programmer name,  and 3) PRJ,PRG  to
		set both project  and programmer.   Note that  this
		command cannot  be abbreviated  beyond ALIA.   This
		command types  out  your  new  ALIAS  on  both  the
		current piece of paper  and PP 0  so that you  will
		see your changed alias when you exit.

   ⊗XAPPEND<cr>	Read in an additional page after the current one so
		that the two may be edited together.  The arrow may
		be moved up and down  on the combined pages  freely
		and the αP  command (with an  argument if  desired)
		may be used  to switch between  the in-core  pages,
		without affecting the APPEND status.  αβP  commands
		will, however,  release all  pages except  the  one
		specified.  The  ⊗XCANCEL command  (below)  cancels
		all corrections  on all  of the  in-core pages  and
		releases all pages except the first.

   ⊗XAUTOBURP	This command  can  be  used  to  set  or  read  the
		threshold  number   of   records   of   nulls   for
		autoburping.  If no  numeric arg is  given, E  will
		simply type out the current threshold.  A  positive
		arg to this command sets the threshold to that many
		records.   A   zero   or  negative   arg   disables
		autoburping entirely.  An arg of just "+" sets  the
		threshold to its default value, which is  currently
		19.  (A  page  to  be  written  out  that  has  the
		threshold number of records of nulls, or more, will
		be automatically burped  to delete  all records  of
		nulls from that page.)

   ⊗XBACKGO	Go back to the last page referenced just before
		the one	now being viewed.

   ⊗XBEEP       Beep me now.  This may be typed ahead whenever
		desired and you will be beeped when this
		command is reached.

   ⊗XBURP<cr>	Write out the current page and in the process reduce
		the disk space for that page to a minimum by deleting
		any all-null records from the current page.

   ⊗XCANCEL<cr> Do not write out the current page but instead 
		reread it in from the disk.  See under ⊗XAPPEND
		above the treatment of appended pages.  See
		p. 8 for the effect ⊗XCANCEL has on line marks.

   ⊗XCLOSE<cr>	Close the file.  This allows others to read it
		if you had modified it.

   ⊗XDDT<cr>	Branch to RAID if it is present.  αP returns.

   ⊗XDELETE<cr> Delete the page mark between this page and the next.
		Note that using this command just after a ⊗XMARK
		command does not undo the newly inserted mark
		but it does delete the next mark.

   ⊗XDRAW<cr>	Redraw the complete screen.  Used when unwanted
		marks show on the screen from whatever cause.
		(This does the same thing as ⊗V).

   ⊗XFIND	See p. 13 for details on FIND.

   ⊗XGORPG<cr>	Exit from E and repeat the last RPG command.

   ⊗#⊗XHEIGHT	Set the number of lines of display to be used to
		the decimal argument given (#).  There is a minimum of
		10 lines.  The maximum is terminal dependent.
		⊗XHEIGHT without an argument will reset the display
		size to the normal height.  (This command is
		especially useful on IIIs to reduce flicker.)

   ⊗XJUST<cr>	Justify the current page  (or the ATTACH buffer
		if in ATTACH mode) using the default values for
		the paragraph, left and right margins.  Margins
		are initially set to 1,1,69.  For elaborations on 
		this basic command, see p. 16.

   ⊗XLINCNT	Type out (1)  the number of  the current line,  (2)
		the number of  lines on the  current page, (3)  the
		number of  columns in  the  current line,  (4)  the
		number of characters on  the page, (5) the  current
		page number, and (6) the number of lines  attached,
		if any.

   ⊗XMAIL <destinations and switches><cr>
     or
   ⊗XSEND <destinations and switches><cr>
     or
   ⊗XREMIND <destinations and switches><cr>
		Execute a system MAIL, SEND or REMIND command using
		text from the current page or attach buffer.  If  a
		numeric arg is  given with any  of these  commands,
		only thatmany  lines of text  are included in  the
		message.  If a zero arg is used, a one-line message
		can be sent  entirely from the ⊗X-command line  (no
		text from page or attach buffer sent).  To do this,
		you MUST separate the  message text on the  command
		line from the command itself with a FORMFEED.   For
		example, ⊗0⊗XSEND ME<ff>Hey,  it really  works!<cr>
		will send ME the message "Hey, it really works!"  A
		formfeed in the  command line can  also be used  to
		include a subject or an initial text line ahead  of
		the message  text being  output from  the page  (or
		attach   buffer).    That   is,    ⊗!⊗XMAIL/SUBJECT
		PRG<ff>Sending  mail  from  E<cr>  will  mail   the
		current paragraph to PRG with the subject  "Sending
		mail from E".

		These commands are executed by starting up  another
		job  running  the  MAIL  program.   When  that  job
		finishes, it  will  type  out  a  message  on  your
		terminal reporting the  success or  failure of  the
		command.  Detailed  information on  failure is  not
		given.  See  Appendix  4  in  the  Monitor  Command
		Manual for full details on the form of switches and
		destinations for these commands.

   ⊗XMARK<cr>   Insert a page mark between the CURRENT line and
		the line above it and display the new page.
		If there is an attachment when this command is 
		given, the attachment will be set down at the top
		of the newly created page.
		Note that this command name may be shortened to M
		but not to MA.

   ⊗XNDFAIL<cr>	Insert a new first line listing all labels that appear
		on the current page in appropiate FAIL format for a
		directory listing.  See page 31 for full details.

   ⊗XNDSAIL<cr>	Insert a new first line listing words that follow certain
		catagory words (default catagories are RECORD!CLASS,
		RECORD_CLASS and PROCEDURE) on the current page in
		appropriate SAIL format for a directory listing.  See
		page 31 for full details.

		If more than one
		page is in core (by the use of the ⊗XAPPEND or β<ff>
		commands), then the new line will contain the labels
		from all such pages, and it will appear at the start
		of the first in-core page.

   ⊗XPROTECT<cr>	 Display the protection key for the file
		being edited.

   ⊗XPROTECT 111<cr>	 Change the protection of the file being
		edited to the octal value that is typed (in this
		case to 111, coresponding  to  write  protection
		against all users).  Only 3 octal numbers may be
		given.  An attempt to change the protection of a
		file that is protection protected againt the user
		will not work.

   ⊗XREADONLY<cr> Inhibit any further writing of the file.  You
		can leave  readonly mode  with the  ⊗XREADWRITE
		command (if the file is formatted).  If you try
		to write out  a changed page  while you are  in
		readonly mode  in  a  formatted  file,  E  will
		demand that you respecify the mode (readonly or
		readwrite)  that you  want.   If  you   choose
		readwrite, the  changed  page will  be  written
		out.

   ⊗XREADWRITE<cr> Enable writing  (modifying)  the  file.  The
		file must  be  formatted for  this  command  to
		work.  However, if you  are editing a  one-page
		unformatted file, this command will still  work
		by changing you to /N mode (no directory on the
		disk).

   ⊗XSPOOL	These  commands spool  on the line printer and XGP,
      and	respectively,  the  current  page,  or  the  ATTACH
   ⊗XXSPOOL	buffer if something is attached, without writing it
		out in the current disk file.  If a numeric arg  is
		given for either of these commands, only that  many
		lines of text  are spOoled (they  are spooled  from
		the attach buffer if  anything is attached).   This
		allows you to spOol a copy of changes that you have
		made whether or not you intend to incorporate  them
		into the  disk  copy  of the  file  that  is  being
		edited.  The spooled copy  carries the same  header
		information as it  would have carried  had it  been
		spooled in the usual way.  For spooling on the  XGP
		(⊗XXSPOOL  command),  the  default  font  and  page
		margins are used.

   ⊗XSIN(cr)    Put Spaces IN, in place of TABS, for example, so
		that the actual spacings will be presErved  when
		extra characters are added ahead of TABs.   This
		command may take a prefixed argument  specifying
		the number of lines to be operated on.   Without
		an argument it is applied to the entire page  or
		to the entire ATTACH buffer.

		This command will, of course, increase the space
		occupied  by the text  on the disk.  The inverse
		command, ⊗XTIN, should be used  to replace spaces
		by TABs, and then, this should be followed by an
		⊗XBURP before saving the page.

		SINning without TINning and BUrping is bad.

   ⊗XTIN<cr>	Put Tabs IN, in place of spaces, when this will
		result in a net saving in the space  occupied by
		the text on the disk.  Extra spaces  and/or TABs
		at the end of lines are also deleted.  No change
		is made in the way the text is displayed.   This
		command may take a prefixed argument, to specify
		the number of lines to be processed.  Without an
		argument it is applied to the entire page or the
		ATTACH buffer.  The inverse command is ⊗XSIN!

		While this command  reduces the number of spaces
		used in the text, it does not necessarily reduce
		the space that the text will occupy on the disk.
		The command ⊗XBURP should be used after  the ⊗XTIN
		command, for this purpose.

   ⊗XSAVE	Write out the current incore page(s) and any attach
		buffer in the  file E$SAVE.TXT on  your LOGIN  disk
		area.  This is  done automatically  for almost  all
		fatal errors detected  by E; when  it happens as  a
		result of such an error,  a message to that  effect
		is typed  out.  (The  file  E$SAVE.TXT may  NOT  be
		written out successfully if  the error is  detected
		again while  writing  this file.)   Note  that  any
		previous E$SAVE.TXT file  is superseded  (replaced)
		by the new file.  Note also that this command  (and
		its automatic call upon  error detection) does  NOT
		touch the file you currently have open for editing.

   ⊗TELLME	Send a standard "error report" to ALS reporting the
		last few commands you have given and some interal E
		data.  This  command should  only  be used  if  you
		think you have just  seen a bug  occur in E.   This
		command provides valuable information for  tracking
		down possible bugs.  If  you use this command,  you
		should shortly  afterward  mail a  message  to  ALS
		explaining what sort of bug you think you just saw.

   ⊗TMPCOR	Write out  the  TMPCOR  file now  to  remember  the
		current  place  in  the  current  file.   This   is
		sometimes useful to remember your place if you  did
		something funny originally  that normally  inhibits
		use of the TMPCOR file (like, saying "R ERAID;file"
		instead of "ETV file").

   ⊗XWRITTEN	Type out  the date  and time  at which the  current
		file was previously written and the PPN and jobname
		of the  person who  did  it.  This  information  is
		saved even after you  have modified the file,  that
		is, even  after  the  system has  lost  this  data;
		however, once you switch away from a file this data
		is lost for that file.

   ⊗XVERBOSE	E can be in any one of three possible report states.
     and	The reporting state determines how much information
   ⊗XTERSE	E types out a various times.  The three states are:
		(1) the normal default  state, (2) a verbose  state
		achieved by the command  ⊗XVERBOSE and (3) a  terse
		state achieved by the command ⊗XTERSE.  The  normal
		state can be restored by giving either  ⊗-⊗XVERBOSE
		or ⊗-⊗XTERSE.  You can  find out the current  state
		by giving  either  ⊗0⊗XVERBOSE or  ⊗0⊗XTERSE.   The
		normal state now does somewhat less reporting (that
		is, less typeout) than formerly.  No error messages
		are ever suppressed by the terse state.

		The following remarks are currently suppressed only
		in the Terse state.

		    Only one MARK and you are there!
		    There are no marks!
		    Already marked!
		    Not marked!
		    All marks have been cleared.
		    Removing last MARK on this page.
		    MARKS on this page only have been cleared.
		    Page is empty.  (⊗XNDFAIL, ⊗XNDSAIL cmds)
		    Aborting macro ... (error occurred in macro)
		    Abort of # macros requested from ... (⊗#⊗XABORT cmd given)

		The following remarks are typed out only in the
		Verbose state.

		    N characters added/removed (justify commands)
		    Line now has N chars. (join)
		    You have replaced XXX with YYY (substitute)
		    (detailed info of the parenthesis commands)
		    The new line of N chars lists M items (⊗XNDFAIL/SAIL commands)
		    Calling ... (calling a macro)
		    Ending ... (a macro has finished)


   ⊗XEMPTY	Move to the next empty or non-empty line.  A repeat
     and	argument will cause these commands to look for that
   ⊗XNONEMPTY	many empty or non-empty lines.  A negative arg will
		cause the search to  go backwards.  A positive  arg
		(or default of 1) will ignore the current line  and
		search from the  next line,  but will  not cross  a
		subsequent incore pagemark; hence the search is  of
		only one page.   These commands can  also be  used,
		both inside  and outside  macros,  to tell  if  the
		current line is empty--use  a zero arg:   ⊗0⊗XEMPTY
		is a ng-op if the  currenpλAYαK;∃βLε2ε.↑≥∂∃α⊂1:]⊂⊂;t[4∧
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1)  Lines of any length can now be handled by these commands.

2)  Left margins are now specified in terms of indent values, that is, one
    types 0 (not 1 as formerly) if the line is have no indent.  The  right
    margin is still specified by the column position.

3)  The number of blank lines (B) to be used between paragraphs may now be
    specified by typing  a fourth  suffixing number  (it may  be 0).   The
    initial default situation is for the same number of blank lines to  be
    used after justification  as there  were in the  original text.   This
    condition may be reset by typing -1 as the fourth number.

4)  All margin values are now sticky.  The initial default values are now
    0,0,74,-1.

5)  Switches are now used to change  the way that  E  detects  paragraphs.
    The initially set switch, N, (for Normal) calls for any indent ≥2  (or
    a TAB) to signal a new paragraph.  An Arbitrarily input crown indent A
    may, however, be assigned and used  by means of the switches as  noted
    below.  Switches are sticky and are typed as a single letter following
    the command name, separated from it and from any following  parameters
    by spaces.  For fuller details see p. 16.

Switch	Mneumonic 	Conditions in old text identifying a new paragraph
				(Besides preceding blank line)
N	Normal		Normal crown indent ≥2
G	Get		Get Assigned crown indent A by examining text.
R       Rejustify       Rejustify (old C as new A input crown indent)
A	Assigned	Use Asigned crown indent A (as previously determined).



Other changes to these commands

1)  Punctuation marks . ! and ? followed by a space, even with any number
    of closure symbols (such as ", ), ], etc.) interposed, are treated as
    sentence endings and will be followed by 2 spaces (or a CRLF) when the
    text is justified provided the final closure symbol was originally
    followed by 2 spaces or a CRLF.

2)  The fast indent  commands ← and  → now use  the absolute indent  value
    associated with the  last use  of the ⊗XINDENT  command.  The  initial
    default value is 4.

3)  Indents can no longer be specified relatively.  This feature was seldom
    used and it could be interpreted ambiguously.

4)  All left margin indents now use TABs whenever possible.

5)  THE INDENT and ALIGN now take  switches that specify the way in  which
    interior TABs are  to be handled.   With the S  switch operative,  and
    this is  the default  condition,  all interior  TABs are  replaced  by
    spaces before anything else is done.  With the T switch operative TABs
    are left as TABs.

6)  A negative prefix argument may be used to justify the specified number
    of lines before (but not including) the arrow line.

		  Seven new commands  have been  added.

    These commands  facilitate  the  justification  operations,  both  for
normal text and  for tabular material.   All of the  this explanation  was
justified by means of these new commands.  See p. 16 to 18 for details.
These new commands are noted below.

⊗XJGET  This command examines test to determine the C,L,R values that were
    used in it  justification so that  other unjustified text  can be  put
    into the same form.

⊗XSJFILL  This command separates the text into separate sentences so  that
    the sentences can be reordered as desired.

⊗XSJUST  Similar to *SJFILL but the sentences  are padded so as to  obtain
    right-margin justified as well.

⊗XTABLE  This command  allows  one to  chance  the columnar  positions  of
    tabular text that is already  in proper columnar arrangement with  due
    allowance being made for empty entries.

⊗TJFILL  This command handles tabular material that is not in columns  and
    puts  it  into  any  desired  columnar  arrangement.   There  may   be
    associated textual material which will be left justified.

⊗TJUST  Similar to ⊗TJFILL  but the associated  testual material is  right
    justified as well.

⊗XTJGET  This command  does  for tabular  material  what ⊗XJGET  does  for
    ordinary text.