Opentype features are found in digital fonts with an OpenType format.

For the same glyph, there can be multiple variations (or alternates) along with their default form, as options for stylistic alternative or functional improvement. OpenType features can be activated in apps supporting them or with code lines calling them on a website, if they exist in the selected typeface.

Some principal features are: case sensitive, swashes, various figure styles (old style, tabular, proportional, etc.), and small capitals (or Small Caps).