I need help with odyssey g9 monitor

[Warpedzilla_PSN]

Originally I was playing split screen and had 2160p and 240 hz going. Disconnected laptop from other side and played full screen. After a while I realized it was playing in 1440 and 120hz. Went back to split screen and no matter what I try it won't go back to the higher settings. And help or input is greatly appreciated.