I have imported legacy font files from FLS7 to Glyphs3. When I export them, they appear all bunched up in Mac FontBook as if there is a vertical metrics error but were fine prior to the transition.
I ended up deleting the whole string of custom values that came in with the translation and it looks fine now. Should I always delete all “custom values” brought in from FLS?
At least check them out. Some values might be needed. The hheaAscender is wrong. The rest looks OK but Glyphs can generate them for you so you dont need them.
My UPM is 2048 from day one. My assumption is that the vertical metrics were never properly recognized during the initial translation from FLS5 to 7. I will make a habit of dumping all custom values from now on.