Even when the screen is off, you can easily manage the music on your device with a few simple actions.
Adjusting music when the screen is off on OPPO F3 Lite (A57) is as follows:
Step 1: Go to 'Settings' and choose 'Gestures and Motions'.

Select 'Gestures and Motions'.
Step 2: Choose 'Gestures when the screen is off'.

Choose 'Gestures when the screen is off'.
Step 3: Turn on 'Music Control'.

Turn on 'Music Control'.
Congratulations, you have successfully performed this feature on OPPO F3 Lite (A57).
