elisp: Font Type

 
 2.4.12 Font Type
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 A “font” specifies how to display text on a graphical terminal.  There
 are actually three separate font types—“font objects”, “font specs”, and
 “font entities”—each of which has slightly different properties.  None
 of them have a read syntax; their print syntax looks like
 ‘#<font-object>’, ‘#<font-spec>’, and ‘#<font-entity>’ respectively.
 SeeLow-Level Font, for a description of these Lisp objects.