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.