From the original Amiga UNIX 2.1 manual. Some things it mentions may not be in this release.
NAME
ldf - load POSTSCRIPT-defined NEWS font
SYNOPSIS
ldf [ fontname ]
DESCRIPTION
ldf loads a font into the server. When no argument is specified, it prints out all the language fonts in $FONTPATH. When an argument is specified, ldf searches in $FONTPATH for a font with that name and loads the first instance that it finds.