Why can't I save settings under Gamer1, Gamer2, and Gamer3 modes on my monitor?

For new K series monitors, the way to save settings via the S Switch has been changed. If Gamer1 is selected, the customized display setting is only saved in the monitor.

If you wish to save the setting on the S Switch, you need to press and hold the Gamer key (1, 2, or 3) on the S Switch for three seconds, and then the setting will be saved.