Is it possible to create an auto-hiding palette that pops up when the mouse pointer passes a screen edge or some screen area? (Much like the Dock when set to: Automatically hide and show the Dock.)
There's a macro here:
It works, but it's a bit resource heavy.
If I was to use something like that I'd rather it only worked when a hotkey was down.
Just for completeness: KM supports trigger using mouse gestures.