The GNU troff
formatter and groff
’s output drivers read
device and font description files that detail the
output device and the typefaces available to it, including their glyph
repertoires and the metrics (dimensions) of each glyph. This
information permits the formatter to accurately place glyphs with
respect to each other. The device description file is always named
DESC; fonts are typically described in files with short names
like TR, CR, HBI, or
S.10
Device and font description files are kept in font directories,
which together constitute the font path. The search procedure
always appends the directory dev
name, where name is
the name of the output device. Assuming TeX DVI output, and
/foo/bar as a font directory, the description files for
grodvi
must be in /foo/bar/devdvi. Each directory in
the font path is searched in the following order until the desired
description file is found or the list is exhausted.
GROFF_FONT_PATH
environment variable.
/usr/local/share/groff/site-font /usr/local/share/groff/1.23.0/font
The foregoing assumes that the version of groff
is 1.23.0, and
that the installation prefix was /usr/local. These locations can
be customized as part of the build-time configuration process.