Mute or Unmute Tracks with ALT not work in Win10?

I am reading the Quick Manual on Page 21, there is an example to mute/unmute Tracks with [ALT]
but it seems not to work in Win10 to mute Blocks in the Pattern Sequenzer.

Can anyone agree with me on this?

In this Case it catch my eyes that the Menues are show always CTRL Commands, but i am on windows, can i change this? So that i have STRG instead of CTRL ?

MMB works* for muting

Just curious, do you happen to be using SharpKeys or doing any other key remapping in Windows? Do any other keyboard shortcuts with the ALT-modifier work for you? See this thread since I’m experiencing a similar problem: Keyboard shortcuts using ALT modifier do not work

i will check this later…