Title:
Why do contextual substitutions apply to some Arabic letters but not others? Any tutorial example?
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Message Body:
Hello,
I’m creating an Arabic font in FontCreator and trying to implement contextual substitutions using OpenType features. However, I’m noticing that substitutions work correctly for some letters (like seen, meem, etc.) but not for others (like alef or hah), even though I’ve set up similar rules for all of them.
I wonder if I’m missing something in the script settings or in the way the lookups are defined.
Could someone please share a clear example or tutorial of how to properly implement contextual substitutions (like initial and medial forms) for Arabic letters? Especially how to ensure consistent behavior across all characters.
Thanks in advance!