(groff.info)Font Directories

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2.4 Font Directories
====================

Basically, there is no restriction how font files for `groff' are named
and how long font names are; however, to make the font family mechanism
work (Note: Font Families), fonts within a family should start with
the family name, followed by the shape.  For example, the Times family
uses `T' for the family name and `R', `B', `I', and `BI' to indicate
the shapes `roman', `bold', `italic', and `bold italic', respectively.
Thus the final font names are `TR', `TB', `TI', and `TBI'.

   All font files are kept in the "font directories" which constitute
the "font path".  The file search functions always append the directory
`dev'NAME, where NAME is the name of the output device.  Assuming, say,
DVI output, and `/foo/bar' as a font directory, the font files for
`grodvi' must be in `/foo/bar/devdvi'.

   The elements of the search path for font files are (in that order):

   * The directories specified with `gtroff''s or `groff''s `-F'
     command line option.  All device drivers and some preprocessors
     also have this option.

   * The directories given in the `GROFF_FONT_PATH' environment
     variable.

   * A site-specific directory and the main font directory; the default
     locations are


          /usr/local/share/groff/site-font
          /usr/local/share/groff/1.20.1/font

     assuming that the version of `groff' is 1.20.1, and the
     installation prefix was `/usr/local'.  It is possible to fine-tune
     those directories during the installation process.