Issue creating Vietnamese diacritics

Glyphs
1

Background info: I opened a RoboFont .ufo in Glyphs and saved it as .glyphs file. In the RF file, I had Latin X diacritic marks already designed.

In Glyphs, I set up my Vietnamese combined diacritics (ex. brevecomb_hookabovecomb, etc.) and got the positioning and spacing of those by placing anchors.
For each of the combined diacritics, I also set _top anchors so they would position correctly on the alphabetic glyphs.I assumed when using “Generate,” that Glyphs would use the combined diacritics, but it seems to have used the individual diacritics and placed those.

What am I doing wrong?

01_combined_Diacritics
01_combined_Diacritics3054×408 14.1 KB

02_generated
02_generated2468×2324 277 KB

combined
combined1796×2128 152 KB

2

Make sure you have top anchor in “A” and in the Acircumflextilde glyph open Glyph menu on top - Create Composite if still wrong try right click and enable automatic alignment

make circumflexcomb_tildecomb.case so it will go to uppercase letter

3

Thank you.
I already have the top anchor on the cap A.
I gave Acircumflextilde as an example, but this is happening with all of the stacked Vietnamese glyphs.
Glyphs is placing the “circumflex” and “tilde” accents separately onto the “A” and not using the “circumflexcomb_tildecomb” combined accent.

4

duplicate the circumflexcomb_tildecomb and make the new glyphs from that with .case suffix so it will be “circumflexcomb_tildecomb.case”, all the diacritics with “.case” suffix will go to uppercase letters

5

OK. I will try that, but the same thing is happening with the lowercase letters.

6

Screenshot 2025-09-16 at 00.17.58
Screenshot 2025-09-16 at 00.17.58701×299 27.4 KB

also make sure “Disable automatic alignment” are unchecked in font info

7

Thank you.
“Disable automatic alignment” was already turned off.

8

I just tried it. It seems to prefer circumflexcomb.case + tildecomb.case instead of circumflexcomb_tildecomb, but will pick circumflexcomb_tildecomb.case if available.

9

circumflexcomb_tildecomb (and others) was what Glyphs had given me as the name under the Latin > Vietnamese > right click, Generate option.

I’m not familiar with the suffix “.case” is it only for uppercase letters? What would one do for lowercase?

10

Yes, for uppercase.

Read this:

11

Thanks @GeorgSeifert and @mekkablue
This doesn’t seem to cover the issue I’m running into, though.

12

If you have .case accents for your single (non-stacked) accents, Glyphs will prefer those over stacked accents for capital letters.

You’ll need to create accentcomb_accentcomb.case accents if you want the automatic composition to work as intended by Glyphs.