I created a first version of EasyLetter for macOS. It enables you to create uniform letters without having to deal with ambiguous constraints in layout programs.
You can use standards for US Letter and A4 (DIN 5008-A or DIN 5008-B) as layout and the following core features:
✅ Optional folding...
I often switch between English and Hungarian while typing, and it would be inconvenient to swap keyboard layouts mid-sentence as many the keys are in different places and I can't memorize them all.
I realize that OS X has the "press-and-hold" special character feature, but this feature doesn't...