I have two questions:
1- What is the point of defining groups of glyphs as marks if one has already created combined glyphs? In other words: I am trying to add a GSUB lookup table to a Latin font which has already combined glyphs. Can I ignore this step?
2- I tried to create a substitution lookup table but it did not work. I expect there is a syntax issue in my writing of the definitions. But, should I use the glyph ID or the Uni codepoint? Can you provide an example?
Thanks for your help.