Redmi k40 the following three key settings.

You can cancel the three buttons in full screen, and you can turn off the vibration effect in the settings.

Tool: Red Rice 5 mobile phone.

1. Turn on the phone and click Settings on the desktop.

2. After entering the settings page, click Full Screen.

3. Click the full-screen gesture after entering the full-screen setting.

4. Cancel the vibration effect and return to the settings page. Click Sound and Vibration.

5. Click on the point to vibrate on time.

6. Click Close to turn off the vibration effect.