How InDesign Understands Fonts
A daring exposé of the numerical truths behind all those characters you type
Psst! Want to hear a little secret? Fonts are not what you think they are!
Most people think that fonts are a collection of characters, or glyphs, such as the letters of the alphabet, numbers, and odd symbols. But actually, fonts are software programs that include thousands of instructions. Of course, most of those instructions do describe glyphs—most importantly, how to draw them, and how to adjust them in low-resolution displays so they’ll be more readable.
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David, great article, but it looks like a sentence or two may be missing between Figure 4 and the sentence, “When you do that, the Unicode number typically stays the same, but the GID number changes.”