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 documentation 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 horizontal 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/slantimagen6 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.  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  uses  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 equations (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  Typesetting),  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.