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Stylistic sets (sometimes written as “style sets”) are groupings of alternate glyphs that allow the user to switch on (via OpenType) sets of related alternate glyphs one at a time.

![The ”a” and “g” characters, rendered with their default glyphs and then again in alternate glyphs contained in a different style set.](images/thumbnail.svg)

According to the personal tastes of the type designer or foundry, each style set might contain multiple alternate glyphs—for instance a different “a,” “g,” and “z”—or the set might be limited to just one character.

If the type designer goes to the trouble of giving their stylistic sets human-readable names, they may be named according to the characters they modify (e.g. the “Arrows, triangles and circles” set in Alegreya) rather than the default set names (“ss01”, “ss02”, etc.).