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GFTODVI(1)							    GFTODVI(1)

NAME
       gftodvi - make proof sheets from generic font files

SYNOPSIS
       gftodvi [ -overflow-label-offset=real ] [ -verbose ] [ gf_file_name ]

DESCRIPTION
       This  manual page is not meant to be exhaustive.	 The complete documen‐
       tation for this version of TeX can be found in the info file or	manual
       Web2C: A TeX implementation.

       The  gftodvi  program  converts a generic font (gf) file output by, for
       example, mf(1), to a device independent (DVI) file (that	 can  then  be
       typeset using the same software that has already been written for TeX).
       The characters in the gf file will appear one per  page,	 with  labels,
       titles, and annotations as specified in Appendix H (Hardcopy Proofs) of
       The Metafontbook.

       gftodvi uses other fonts in addition to the main	 gf  file.   A	`gray'
       font is used to typeset the pixels that actually make up the character.
       (We wouldn't want all the pixels to be simply black, since then labels,
       key  points,  and  other information would be lost.)  A `title' font is
       used for the information at the top of the page. A `label' font is used
       for  the	 labels on key points of the figure. A `slant' font is used to
       typeset diagonal lines, which otherwise have to be simulated using hor‐
       izontal	and  vertical rules.  The default gray, title, and label fonts
       are gray, cmr8, and cmtt10, respectively; there	is  no	default	 slant
       font.

       To  change  the	default	 fonts,	 you can give special commands in your
       Metafont source file, or you can change the  fonts  online.  An	online
       dialog ensues if you end the gf_file_name with a `/'. For example,
	 gftodvi cmr10.300gf/
	 Special font substitution: grayfont black
	 OK; any more? grayfontarea /home/art/don/
	 OK; any more? slantfont /home/fonts/slantimagen6
	 OK; any more? <RET>
       will  use  /home/art/don/black as the `gray' font and /home/fonts/slan‐
       timagen6 as the `slant' font (this name indicates a font for lines with
       slope 1/6 at the resolution of an Imagen printer).

       The  gf_file_name  on  the  command line must be complete. (The program
       prompts you for it if you don't give it.)  Because  the	resolution  is
       part  of	 the  extension,  it  would not make sense to append a default
       extension as is done with TeX or DVI-reading software. The output  file
       name  defaults  to the same root as the gf file, with the dvi extension
       added. For example, the input file cmr10.2602gf would become cmr10.dvi.

OPTIONS
       The argument to -overflow-label-offset specifies the distance from  the
       right  edge  of	the character bounding box at which the overflow equa‐
       tions (if any) are typeset.  The value is given	in  TeX	 points.   The
       default is a little over two inches.

       Without	the  -verbose  option,	gftodvi operates silently.  With it, a
       banner and progress report are printed on stdout.

ENVIRONMENT
       gftodvi looks for gf_file_name using the environment variable  GFFONTS.
       If  that is not set, it uses the variable TEXFONTS. If that is not set,
       it uses the system default.

       See tex(1) for the details of the searching.

FILES
       {gray.tfm,...}
	      The default fonts.

       {gray.mf,...}
	      The Metafont sources.

SEE ALSO
       tex(1), mf(1).
       Donald E. Knuth, The Metafontbook (Volume C of Computers	 and  Typeset‐
       ting), Addison-Wesley, 1986, ISBN 0-201-13445-4.
       Donald E. Knuth et al., Metafontware.

AUTHORS
       Donald  E.  Knuth  wrote	 the  program. It was published as part of the
       Metafontware technical report, available	 from  the  TeX	 Users	Group.
       Paul Richards ported it to Unix.

Web2C 7.3.1		       14 December 1993			    GFTODVI(1)
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