CTRL + Z doesn't work anymore

All of a sudden, it doesn’t work. I tried ‘reset to factory’, no luck.

Now that I’m at it, I have another question (maybe there’s a connection?): I 'd like to install a shorcut key combination for making selected bars into one system. I thought I had installed ‘CTRL + ALT + S’ for this function, but this doesn’t do anything.

Does anyone have experience with these things?

Greetings, Esther

most often if a keyboard shortcut was working and suddenly isn’t, it means that the keyboard has (probably accidentally) been changed to a different regional layout. I’d check this first.

Ofcourse! Thanks!