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       gftodvi - make proof sheets from generic font files


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


       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.  (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 uses the same root as the gf file, with the dvi  extension  added.
       For example, the input file cmr10.2602gf would become cmr10.dvi.


       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.


       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.


              The default fonts.

              The Metafont sources.


       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.


       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.