User Guide

Multiple Master Fonts
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In the example we used only two master fonts, and we changed only one
property of the font using interpolation. But we can define more master
fonts and get even more choices for changing the design of the font. For
instance here’s what happens when we use four master fonts: now we can
vary both the fonts’ width and weight:
Narrow Light Wide Light
Wide BlackNarrow Black
The text sample typed with different instances of the same Multiple Master font