This section gives you step by step instructions on how to lock the screen and stop it rotating in iOS 15, with pictures of the screens to help.
1. First, open the Control Centre. On iPhones and iPads with Face ID, swipe down from the top-right corner of the screen. On iPhones and iPads with a Home button, swipe up from the bottom of the screen.
2. Tap the Rotation Lock icon to activate the lock. When active, the screen rotation lock icon will be red on a white background.
3. Return to the Home screen by swiping up from the bottom of the screen or pressing the Home button.