Under normal operation, the LaserWriter automatically purges downloaded fonts
at the end of each print job. Fonts are retained in memory only when they
have been manually downloaded.
(The number of downloadable fonts varies with the size of the font files, type
of laser printer, and amount of available memory. When using the LaserWriter,
four to six fonts may be downloaded per print job.)
If the fonts are not automatically purged at the end of the print job, they
must be cleared from memory manually -- either by turning the printer off and
on, or by resetting the printer, which forces a test page to be printed.