Xiaomi How to Set System Navigation via Buttons or Gestures

In the Xiaomi smartphone settings, we can specify whether we want the App Toggle, Home, or Back buttons to appear, or whether we want to use gestures to control the device in full-screen mode. If the full-screen gestures are enabled, the following system navigation gestures apply

• Return to home screen: Quickly wipe from the bottom to the top.
• Open last apps (app toggle): Wipe from bottom to top and hold.
• Back: Wipe from the left edge to the right edge, or vice versa, both are possible.