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Real World Mac OS X Fonts by Sharon Zardetto Aker

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10. Learn about Characters in Fonts

Most of this chapter qualifies as background information, but don’t think that means you don’t really need to know it! It helps you make the most out of 21st-century fonts because it

explains the glyph approach to font characters; describes how applications handle characters that don’t have Unicode IDs (which is why some characters might disappear as you move them from one application to another); and shows you why you should care about alternate characters available in your fonts (genuine Small Caps are better, as are designed fractions, superscripts, and subscripts!).

The World According to Glyphs

A glyph, in fontspeak, is a single entity of a particular shape. You can refer to an uppercase A as a letter ...

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