make one button to exit mame emulator instead of start+select?

[maksi]

Hi,

I've read that I can change the hotkeys to exit an emulator here: https://github.com/RetroPie/RetroPie-Setup/wiki/RetroArch-Configuration#example-per-system-control-override-retroarchcfg
but that still requires 2 buttons to be pressed at the same time.

input_enable_hotkey_btn = 8
input_exit_emulator_btn = 9
This means that I first need to press whatever button is mapped in "8" and then press the button "9". Is there any way to map just one button to exit the emulator? I have a button "6" that I don't use it for anything, so I'd like to make that button be exit emulator.

Also, a quick related question, what happens if I press the hotkey for exiting the emulator, while I am in the emulation station menu?

Thanks.