highlight the key pressed in the key map

[OvahKeel]

when you press a key, highlight it in the keymap. In addition if you select a key that is already in the keymap it should highlight all instances of that as well (possibly using the same color as whatever layer it is on so it is easier to keep track of).

Another part of this could be to highlight all of the keys (down below) that are currently assigned with the color of the layer they are on (or something right above them that specifies what layer it is assigned to)