The "fontfile" statement is used to override a Mup font with
some other font. You may place one or more of these anywhere in Mup input.
This might be used either because you'd like a different
style of printing, or because you need a different alphabet.
The "mkmupfnt" program
that is distributed with Mup
can be used to generate a font description file. You can then use
fontfile "file"
Mup searches for fontfiles via the MUPPATH mechanism, just like for included files.