Variable Font Variation Glyphs

Glyphs
1

When I use variable code in a rlig feature such as the following:

#ifdef VARIABLE
condition 85 < wght <  90, 100 < wdth < 120;
sub e by e.round;
#endif

The glyphs that use e as a component, i.e. edieresis doesn’t swap the e for the e.round. Does this feature not take care of component glyphs in one go, i.e. do I have to manually make alternates for all the glyphs that use the glyph being swapped out as a component?

2

Ok inspecting a GXTTF produced by GA3 that had alternate layers tells me in fact you do need to make all those alternates.

3

Yes. With brace layers, Glyphs will add the alternates for all composites. When you do it manually, you need to add those, too.