2. In the setting menu, click System and Update to enter a value;
3. Click on the bottom of the system page to enter "System Navigation Mode;
4. Click to select the Gesture Navigation check box. After this option is enabled, you can slide inward from the left and right edges of the screen to return to the previous level;
5. Slide the middle position at the bottom of the screen upward from the bottom of the screen to the desktop, and stop for a while to start background operation.