One of the key features of the ColorOS is the use of gestures to launch apps or certain functions even when the screen is turned off. There are a total of 13 Screenoff gestures, which you can personalize to launch your preferred apps.
For example, the default functions for drawing a circle on a locked screen will activate the Camera app while a downward arrow will turn on the flashlight function. For Screen-off gesture to work, you have to enable it via Settings > Gesture & Motion > Screen-off Gestures.
Here are 9 of the 13 screen-off gestures that you can execute on any Oppo smartphone.