It doesn’t work with the azerty french keyboard layout. With windows 10 it worked with ctrl + 6 and ctrl+shit++.
The issue is of course when you do not have numpad with + and - dedicated key. on Azerty keybord, + is above the = key, next to backspace ( need to shift it if you want to keyin +, but strangely not needed to shift for the zoom command) and - is below 6 key, ctrl± doesnt work, nor ctrl+shift+6 …