I used Fontforge a while ago with much success. But Ive come back to it with a big problem. I can't see the glyph editor. On Windows 10 with a new download and install. I start a new font and get that screen OK, but when I double click on a glyph, the editor just doesn't show up. Same problem on two computers. There is a message in a separate screen;
The following table(s) in the font have been ignored by FontForge
Ignoring 'LTSH' linear threshold table
Ignoring 'VDMX' vertical device metrics table
Ignoring 'hdmx' horizontal device metrics table
Cheers
John