Pop-up menu on long-press of modifier keys

[thomasaarholt]

I am very fond of the menus that pop-up to show the keymap with a brief explanation when entering minor modes, like g and space.
I find it very hard to remember what it is that the modifier keys do, like Ctrl-i to jump forward on the jumplist.
Could it be an idea to (optionally) show a pop-up menu when the user long-presses Ctrl, Alt, or Shift? (Shift is rather unused, so maybe not that one.)

[pascalkuthe]

I don't thinkwe can detect that kn a terminal. We only get a single keypress event.

[thomasaarholt]

I see. How about double-tapping the modifier key, within some short period of time? Or would that interfere with other usage?

[pascalkuthe]

That is also not available on a terminal. Modifiers dint have their own keypress events they ar only flags applied to other key events