Go to [Settings] > [Convenience Aid] > [Gesture & Motions] > [Screen-off
Gestures].
After enabling Screen-off Gestures, you can choose to add the following
gestures:
Double tap to turn the screen on.
Draw an O to enable the camera.
Draw a V to open Flashlight.
Music control: You can use two fingers to draw "II" on the screen to
stop or resume playing music and "<" or ">" to previous or next
music even when the screen is off.
Add Screen-off Gestures
You can also add your personalized Screen-off Gestures, for example,
slide up to open the calculator.
Smart Sidebar
Smart Sidebar enables you to switch between apps, transfer files, reply
messages, or take screenshots when playing a game or watching a
video.
Go to [Settings] > [Convenience Aid] > [Smart Sidebar].
