(Note: The change caused by this menu option is only 
visible by opening another hypertext file or by using 
a jump link to another file.)

The "Fonts" and "Backgrounds" menu options all are 
used to set various properties of the HTDisplayBox
component. Cool properties affect text which is not
active, ie does not activate a link. Hot properties
are for text which is active.

Font properties are global; they affect all instances
of their base type (cool or hot.) To change an in-
dividual piece of text, use the OnHandleShow...Text
methods.
