how to assign "hold down red button"?

[mlevin77]

I want to assign "lock device and screen off" to "hold down red (hangup) button". I have tried a couple of different ways but whenever I press and hold it to indicate to the key control app what button I have in mind, it just goes to the quickmenu choices for shutdown - it doesn't capture it at all. Is there any way to do this? Alternatively it would be great to just have it default to lock device and turn screen off (like it used to do) when I hold down the hangup button. Something made that behavior change recently and I can't figure out how to set it back.

Mike