I could not find anything in the forum on this:
the shortcut for "zoom in" is "Ctrl + =".
On a German Keyboard "=" sits above the Zero. In other words press "shift + 0".
However, "Ctrl + Shift + 0" does not zoom in.
What would then be the shortcut?
Thanks a lot for your help. There is no "=" sign on my keyboard numberblock. This is probably just another sting from cycling to make Windows users feel humiliated.
Anyway, I took your advice, modified the maxinterface.json (first did a backup) and now everything works fine. Big help to me. Thanks once again.