In the Settings > Security and Fingerprint > screen, turn on this function, as shown below:

1, in Settings > Security and Fingerprint > screen fixed open;

2. Open the screen you want to repair, such as the calculator interface;

3. In the multitasking interface, slide up the recently opened calculator interface, and you will see the pushpin icon 3 in the lower right corner;

4. After clicking the icon, you will be prompted that the screen has been repaired;

5. If you need to cancel, press and hold the Enter key for a long time until the system prompts you to cancel the screen fixation.