Just upgraded (new Install with roms copied over) to Retropie 3 and setup controls in Emulation Station. Now from 2.6 the L and R buttons mapped to page up and page down when browsing roms. Is there a new way of doing this on RP 3?
I don’t believe this has changed in RP 3 so it should just work.
I have had some issues with this in the past as well but a simply reboot fixed it for me.