EN: Feature-rich

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The OpenType font format offers numerous advanced typographic features. However it is up to the type designer or foundry to decide how many and which ones to implement. Feature-rich or fully-featured OpenType fonts have a large number of those advanced functionalities built in. Certain (older) operating systems and applications cannot access OpenType features. In those environments OpenType fonts behave like standard PostScript or TrueType fonts with a basic character set.
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