doc: Link to harfbuzz font feature format

This commit is contained in:
Florian Bruhin 2021-06-15 17:36:12 +02:00
parent 51f8b22dfa
commit 9fffe0d710

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@ -140,6 +140,10 @@ changes the appearance of the zero (0), to make it more easily distinguishable
from Ø. Fira Code Retina also includes other discretionary features known as
Stylistic Sets which have the tags :code:`ss01` through :code:`ss20`.
For the exact syntax to use for individual features, see the
:link:`Harfbuzz documentation
<https://harfbuzz.github.io/harfbuzz-hb-common.html#hb-feature-from-string>`.
Note that this code is indexed by PostScript name, and not the font
family. This allows you to define very precise feature settings; e.g. you can
disable a feature in the italic font but not in the regular font.