Stuck on main screen

I have the monitor index configured wrong. I am trying to view the interface. I’m on a tower PC connected via HDMI. I have it configured so there is no wrap around. Does anyone know what I can press to get to the monitor index specifically so I can change it since I can’t see anything but the lakka symbol?

easiest thing to do is SSH, stop the RetroArch service and then edit your ~/.config/retroarch.cfg in a text editor. Look for this line: video_monitor_index = “0”