Yes, I know ;) This line was by default at the end of ‘/opt/retropie/configs/all/retroarch.cfg’. > “input_enable_hotkey_btn = nul”
After I changed the hotkey behaviour: ‘/home/pi/RetroPie-Setup/retropie_setup.sh’ > “Configuration” > “Change hotkey behaviour” > “Press ALT to enable hotkeys.”, this line changed into “input_enable_hotkey_btn = alt” and “input_menu_toggle = F1” was added.

In my last post I listed the behaviour in every emulator I want to use twice. One time with “Hotkeys enabled (default)” and the other time with “Press ALT to enable hotkeys”. The best result I had with the second option: I was able to open RGUI with ALT+F1, switch shaders with ALT+M/N and exit the emulator with ALT+ESC. But only in SNES and Playstation emulator. In N64 emulator only ALT+ESC for exiting works.. nothing more. Even the button (btn#6; SELECT) doesn’t work. And if I try to use left analog stick (btn#9) for exiting the emulator it doesn’t work at all.. SNES, N64, PS. :/