I use Yakuake to drop down a terminal window and with the keyboard that I have I set the drop down hotkey to the tilde key. This caused a problem. My problem with doing that is that the keyboard, a Razer Blackwidow Chroma, has a macro key (M1) next to the tilde key, so, I often hit that key instead. That is very much an irritant.
It appears that when I press it I get the quick settings menu. When I went looking for a way to change the application (quick settings) that was assigned to that key I could not find the way. Not knowing precisely what the quick settings is was frustrating. I decided on a work around, which was to basically unassign it by reassigning something else to that macro key.
What I did to overcome this was to just find some obscure application such as emoji and to select to assign that macro key to the emoji app instead. When I did this the system warned me that that key was already assigned and asked me to if I wanted to reassign it anyway. Affirmative. Then, I chose to do that again, only I chose to reassigned a different key combination to that application. That wiped the macro key next to the tilde.