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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. (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.

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.