Hi @Matthias_Haldimann and welcome to the Community Forum 
@Marie: Yes - I do.
With both languages (Swiss German & Swiss French) it does not work. However, I also switched my Keyboard Language to English (USA and UK) and it still does not work (on a Mac). So not sure if it’s a generall issue?
@Matthias_Haldimann To be sure: Please quickly verify that it is not disabled by accident. See here: Disable Short Cut Key: Ctrl Shift + - #2 by Emily_Roman
But as mentioned above. It does not work for me as well.
Cheers
Daniel