Hi Michael,

Ctrl+Z is okay I guess, only it's a two button combo and sometimes you have to look down at the keyboard to locate them, where the Esc key is a known extreme top left button that you go by feel.
I was thinking more like a small button as you show for the indicator and filter in your examples, maybe appearing close by when you turn the filters on, that's one suggestion.

In turning on the filter with the Ctrl modifier does that go for turning it off also ?

Cheers