Samsung SM-J530GM/DS User Manual page 82

Apps and features
Setting the schedule for the Always On Display feature
Launch the Settings app, tap Lock screen → Always On Display, and then tap the Show
always switch to deactivate it. Then, tap Set schedule and set the start time and end time.
Controlling music playback when the screen is off
You can control music playback when the screen is off, without turning on the screen.
Launch the Settings app, tap Lock screen → FaceWidgets, and then tap the Music
1
controller switch to activate it.
2
To control music playback when the screen is off, double-tap the clock.
3
Tap the icons to control the playback.
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