This section gives you step by step instructions on how to turn off Shake to Undo in iOS 15, with pictures of the screens to help.
1. Tap the Settings icon on your Home screen to open the Settings app. Scroll down and tap Accessibility.
2. On the Accessibility screen, tap the Touch option.
3. On the Touch settings screen, tap the toggle switch for Shake to Undo to turn it off.
4. When you are happy with your settings, you can return to the Home screen by swiping up from the bottom of the screen or by pressing the Home button on devices with a physical Home button.