Features, Part 4: Positional Alternates Tutorial

If you use calt you still have to turn the Contextual Alternates feature On, right? at least in indesign.
Is there another feature that works automatically always?

I’ve put the substitution code in the liga feature because the liga seams to be always On by default in applications. Is there any problem with in doing this?

Yes, but it is on by default. Once a user disables the default, of course, it will be off for that user.

The same as with calt. It is on by default, but if it is disabled, it will not show up.

If you want it always on, consider rlig, or another feature that is not accessible in the UI.

The calt is deactivated if you insert a glyph from the glyph panel.

This reminds me of a question:
Since we also have individual features init, medi, fina and isol to activate specific positional alternative forms, should we also include them and let calt quote the same lookups in those features? If so, what is the preferred order for them and calt? Like which one we should put in first.

Or is it recommended to only build the calt to include the lookups for Latin script-style font like the sample in the tutorial?

I do not know if it is actually different cases for Latin script-style font and other complicated script (like indic) font.

The init, fina and medi features only supposed to be used for Arabic (and similar) scripts. So put all your lookups into calt.

Thank you for the clear answer!

Got it, many thanks. Great tutorial by the way.

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