While your phone is idle on a dock or charger, turn it into a desk clock, a photo frame to show off your pics, or more.
Do any of the following:
The screen saver automatically starts when you connect your phone to a dock or charger and the screen turns off.
To exit the screen saver and return to your home or lock screen:
To manually start your screen saver any time, go to Settings > Display > Advanced > Screen saver and touch Start now.
To prevent the screen saver from starting automatically:
Search for “Screen saver” in Play Store for apps that give you more.
After you install an app, you can select the new ones in Settings > Display > Advanced > Screen saver.