Q: What does CTRL + ALT + F11 do and why did this solve my problems with disappearing menu bars? I have this strange problem that some applications and folder views loose the menu bar. There is nothing wrong with the main window, I can type, select, edit what ever, but when I click on the menu bar - either a item like 'file' or the top bar where the closing 'X' resides - windows behaves as if I clicked on the program underneath it. Sometimes the menu bar is completely grey, but sometimes I see it normally but it is like a ghost.
I accidentally discovered that - at least for a folder view - it is solved when I press CTRL + ALT + F11. Why?
I have this problem occasionally the last few weeks.

A: Now I have found the function of Ctrl+Alt+F11 on my W10Home.
The PC has INTEL UHD Graphics 630.
The change between scaling-options is done by this key-combination.
This Function can be optional switched off, if so, this key-Combination is free for other applications.
