I've been using Font Forge, and I have a font that already has a smcp substitution table, but it's missing some glyphs (it has all the regular latin letters, but is missing ones with diacritics, and I'd like to add those.
Now, in font forge, I can go View -> Display Substititions and select the smcp table. Then I can see the small caps glyphs. But I can't find how to edit those glyphs. If I select a glyph and open it for editing it shows the regular glyph, not the smcp one. If I copy a glyph to paste it into another unicode slot, it copies the regular glyph not the smcp one.
So my question is: how do I edit the glyphs in that smcp sub table? Ideally I'd like to find a way to do this in font forge. But I'm open to other recommended software if font forge proves too cumbersome or limited for this kind of editing.
Thanks in advance for your help!