Exporting Only A

I am testing out if I like Glyphs by using the SetApp Mini Free Trial. I quickly drew A B C D E to just see how kerning is handled, and just generally go through the process before committing. I Saved, and then I went to Export. It “Successfully” exported, and made the .otf file, but it only contained A. When I uploaded the file to FontBook, and tried it out, it still was just A.

How do I make it utilize all the letters created? Thanks!

Please read this: Eliminating font cache problems | Glyphs