Hi Neil, sure, but you're unlikely to be interested since you don't use shortcuts. Right?
The normal procedure with palettes is like this.
A shortcut shows the palette (for one action or permanently). Then you press the single key trigger. Then press the same shortcut again to make the palette disappear.
That's ok, but better is, I press and hold a key, the palette appears, I press a letter (the trigger) the action is executed, I release that key again and the palette disappears. Just like you would do for ⌘ + letter.
I don't have to set if the palette is visible for an action or permanently. As long as you hold eg ⌘ pressed, the palette is visible.
This is especially useful for navigating in a text with j, k, l, etc. instead of the arrow keys. Does this make sense?
edit: Concretely in my case. I press and hold the "4" key (which I can reach blindly with my left index finger), the palette appears. now "j" becomes arrow left. If I release the "4" again, "j" is "j" again, because the palette disappears.