Control How Long Your iPhone 17 Screen Stays On in StandBy Mode

In this video, you’ll learn how to change the StandBy display settings in iOS 26 so the screen turns off automatically in the dark, after 20 seconds, or stays on the entire time. StandBy Mode on the iPhone 17 can act like a clock, photo frame, or smart display while your phone is charging, but you can decide exactly how long the screen stays on. We walk you through where to find the Display options and how to adjust them so StandBy works the way you want.