'A' key to expand/collapse panels

Not to be rude but, seriously?

OK, that was probably too harsh. But is there any way to re-map this functionality to another key. I can’t find anything in the keyboard maps that mention this.

Problem is I have Blender with windows (one on each of two monitors) and when I press ‘A’ with my mouse of the 3D area it collapses the last panel I used in the other window.

Yes, I know I have to click the other window to make it active (Any way around THAT which is a bigger issue but probably a Window’s thing and nothing Blender can do anything about) first but still it’s something I’m having issue with and if I could just remap it do “down arrow” or something I’d be a pretty happy camper.