The number of fonts in any design piece should be no more than 3.
One font could include the variations within the font “family” ie Italics, normal, bold, bold italic of one font, create that font family. The addition of an additional display or feature fonts should be restricted to one only.
The fonts used for any particular piece can be derived (first option) from any design elements that must be included ie any logos that feature in the piece would influence what fonts are used for the rest of the document (in many cases).
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