Window Switcher: Questions

1) Hot key with and without modifiers

I set "F6" to activate the Window Switcher. This is what happens:

  • I press F6
  • the Window Switcher is opened
  • I release F6
  • the Window Switcher is still opened
  • I can move freely with arrow keys left / right / up / down and press q / s / enter

But if I set "cmd+F6" to activate the Window Switcher, this is what happens:

  • I press cmd+F6
  • the Window Switcher is opened
  • I release cmd+F6
  • the Window Switcher is closed
  • I can't move with arrow keys or press q / s except if I hold the cmd key

I have tried all modifiers and different combinations of them and there is no difference. The window switcher is closed when releasing any combination of modifier keys.

Are correct these different behaviours?

If it is correct, how should I configure the actions to press a modifier+key, release them, and keep the window switcher activated for pressing arrow keys and q/s without holding the modifier?

2) Enable Mouse Rollover Selection

What's the difference between check it or uncheck it? I can't see it.

I have found this solution for the 1st question:

It works pretty well. Anyway, if you think another configuration could be better, please tell it to me.

Thanks!