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Appendix: Understanding Fonts

Appendix

The point size of a font is defined as the distance from the top of 
the tallest character in the font to the bottom of the lowest charac-
ter in the font. Due to the definition of point size, different fonts 
printed at the same point size may appear quite different in size. 
This is because there are other font parameters that affect how the 
font looks. However, the point size of a font is an excellent specifi-
cation of the relative size of a font. The following examples illus-
trate two very different proportional fonts at 18 point:

ITC Avant Garde abcdefghABCDEFGH 

A symbol set is the collection of alphabetic and numeric characters, 
punctuation, and special characters available in the font you select. 
Symbol sets support the requirements for different languages or 
specific applications, such as math symbols used for scientific text.

In PCL 5 emulation, a symbol set also defines which character will 
print for each key on the keyboard (or more specifically, for each 
code point). Some applications require different characters at some 
code points. To support multiple applications and languages, your 
printer has 78 symbol sets in PCL 5 emulation.