Configuring Sega and Atari controls

Hi retro people,

I can’t seem to figure out how to change the controls for the Atari 2600 or any of the Sega emulators (SMS, SMD, Game Gear) in RetroPie 3.0.

According to this https://github.com/RetroPie/RetroPie-Setup/wiki/Atari-2600 you can press Tab to enter the configuration menu for the Atari 2600 but Tab does nothing.

Not sure if it will help but I’m using arcade controls attached directly to the GPIO pins.

Thanks in advance.