Xante Accel-a-Graphix CT4, User Manual

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7-18 Imaging Basics _______________________________________
Point Size and x-Height
Point size comes from an old typesetting term for a typeface’s
height. This is measured from the top of highest ascender (the
upward stroke on a character) to the lowest descender (the downward
stoke) within a character set (fig. 7.5).
6 Point
8 Point
10 Point
12 Point
14 Point
18 Point
24 Point
54 Point
Ready
72
Point
PostScript
Ascender
x-Height
Descender
Fig. 7.5 Point Sizes and x-Height
The height of a lowercase letter without an ascender or descender is
referred to as the x-Height. This measurement varies from typeface
to typeface and can cause an optical illusion where the same size
typefaces appear to be different sizes.