Galaxy J3 Prime - How do I adjust screen timeout on my Samsung Galaxy J3 Prime (SM-J327W)?
You can set the length of time the device waits before turning off the display's backlight.
4 Swipe to and touch Screen timeout.
Note: Reducing the screen timeout can also assist on battery conservation.
Galaxy J3 Prime - How do I disable Auto rotate on my Samsung Galaxy J3 Prime (SM-J327W)?
How do I use the Do not disturb on my Samsung Galaxy J3 Prime (SM-J327W)?