DVIDD is a program to display the contents of a DVI file (the output of TeX)
on a Data Disc screen.	To run the program, say

	.r dvidd;filename

where "filename" is the name of your DVI file (extension ".DVI" is optional).
The following optional switches may be used in the command line, after the
filename:

	/nP	Begin displaying at page n
	/M	Use the magnification in the DVI file
	/-M	Use 1440 instead of the magnification in the DVI file
		(this is currently the default setting)
	/nM	Use n instead of the magnification in the DVI file
	/-F	Do not use preloaded fonts (see below)

The DVI file may contain graphics commands produced by \special control
sequences in TeX.  For the format of these commands, see DVIDOV.IAZ[UP,DOC].
All of the textured rectangle commands (including those not accepted by
DVIdover) are allowed.	The "pen size" parameter in \special{join} commands
is limited only by the DataDisc resolution; there is nothing special about the
8 values mentioned in DVIDOV.IAZ.

DVIDD reads fonts in the "PXL" format output by METAFONT.  This currently only
includes Computer Modern fonts.  The default area for font files is [PXL,SYS].

Currently a full set of AM fonts at magnification 1.44 exists.  Some of the old
fonts (the CM fonts) exist also, at magnification 1.5, and many AM fonts also
exist at magnification 1.5 (this is bacause 1.5 used to be the default for
DVIDD; now we use 1.44 because it corresponds to TeX's \magstep 2).  If your
document uses a magnification other than 1.44, the program will show it at
magnification 1.44 anyway, unless you use the "/M" switch (above).  If this
causes the pages to be too wide for the screen, use the ← and → commands to move
around and see everything.

AM fonts corresponding to those used by LaTeX in various point sizes also exist.

If a font requested in the DVI file does not exist, the program will search for
a TFM file instead.  If this is found, it will display the rest of the document
with appropriate blank space for the characters in the font not found.	If there
is neither a PXL file nor a TFM file, it gives up.

Certain fonts are "preloaded", which means that the program already has all the
information in the PXL files for those fonts.  If you do not want to use
preloaded fonts (for example, to try out a new version of a preloaded font), put
the /-F switch after the name of the DVI file.

While running the program, you may use the following commands (where "n" is
any string of digits):

	<form>	Go forward (about 3/4 of a screenful)
	#<form> Go forward # windowfuls
	0<form> Go forward 1/2 window
	α<form> Go forward, changing pages if necessary
	<vt>	Go back
	#<vt>	Go back # windowfuls
	0<vt>	Go back 1/2 window
	α<vt>	Go back, changing pages if necessary
	←	Move text left (about 3/4 of a screenful)
	→	Move text right (about 3/4 of a screenful)
	`	Move text left (about 1/16 of a screenful)
	'	Move text right (about 1/16 of a screenful)
	B	Glitch screen up from bottom
	#B	Glitch sceen up # times from bottom
	E	Exit from the program" & "
	L	Go to the top of the page
	∞L	Go to the bottom of the page
	#L	Show portion of page including the #% point
	P	Go to the next page
	+P	Go to the next page
	-P	Go to the previous page
	#P	Go to page #
	+#P	Go forward # pages
	-#P	Go back # pages
	T	Glitch screen down from top
	#T	Glitch screen down # times from top
	V	Refresh display
	βV	Clear and refresh display
	<alt>	Abort partially typed command
	ε	Edit a file with E
	λ	Edit a file with E, readonly mode
	}	Run DVIdover to print current file
	β}	Create DVIdover command line but don't run it 
	π	Run BOISE to print current file 
	βπ	Create BOISE command line but don't run it 
	@	Run DVIesp to prin curren file
	β@	Create DVIesp command line but don't run it
	?	Display partial list of commands 

<Control> and <meta> are optional, except where shown as α and β.  
<Control> is not allowed for the "}" and "π" commands.

This set of commands has been made to resemble the syntax of E as much 
as possible.