Description:

Groff is a document formatting system. Groff takes standard text and
formatting commands as input and produces formatted output. The
created documents can be shown on a display or printed on a printer.
Groff's formatting commands allow you to specify font type and size,
bold type, italic type, the number and size of columns on a page, and
more. You should install groff if you want to use it as a document
formatting system. Groff can also be used to format man pages. If you
are going to use groff with the X Window System, you'll also need to
install the groff-gxditview package.