cross-posted from: https://lemmy.ml/post/21015575
Hackers Keyboard has that via ctrl+z, but only in horizontal mode. For this only i had my Galaxy S3 in horizontal per default. But can’t do that with modern phones’ aspect ratio and i’m missing undo since then.
https://github.com/Julow/Unexpected-Keyboard
Unexpected Keyboard’s default layout has a Ctrl Key always available.
you can also add in additional shortcuts such as: