@edmaul69 at the top right of the box where you edit posts it has a link compose? which opens a popup which links to http://commonmark.org/help/ which has all the info :)

If you mean you can't use the "exit" hotkey when in RGUI (and the menu hotkey) - I believe so. You have to choose "quit".

Not sure if this is actually by design or not - but you can query it here - https://github.com/libretro/RetroArch

@hepc as far as I know, you need to use ESC from a keyboard. Get a RPI 3 ;-)

@bkibalo this post has useful MAME info:
https://retropie.org.uk/forum/topic/2859/how-to-use-mame-with-retropie-help-guide

@theink
Just a tip to better describe you issues:
It would be better if you explicitly say what software you are using. ;-) Because GUI can be confused with RGUI (RetroArch GUI).

When you say GUI in your previous post it seems that you refers to the emulationstation, anyway.

I got it working. I had a couple lines added in the config file that I did when I was trying to get my wiimote working. I just commented them out and it started working. I haven't tried to see if the wiimote still works after making the change. When I was trying to get it to work I changed and added quite a bit of stuff so hopefully it isn't needed.

@joaovlg try to follow these steps I'm talking here:

https://retropie.org.uk/forum/topic/2719/keyboard-stopped-working-after-i-played-around-in-the-controller-config-in-rtgui/2

@meleu

After pushing this hotkey that I am back in emulationstation, it can hear the sound and can choose a game etc., but the screen (connected over composite) goes black, seems like it loose the connection, comes back for a millisecond and goes black the hole time. The physical conection of the screen is not the fault, it must be something with the hotkey and my retroarch.cfg. (I have different kinds of retroarch.cfg in each emulator.)