Use screen pinning to keep the current screen or app in view until you unpin it. For example, you can pin a game and your child cannot navigate anywhere else on your phone.
You can set up a pattern, PIN, or password required to unpin the screen.
Ask for PIN before unpinning is turned on for your security. If you do not want to require a PIN to access your other phone screens, turn this option off.
Pin a screen
Make sure you've turned on screen pinning in Settings.
Open an app and go to the screen you want to pin.
Touch .
Swipe your list of apps up to see
Touch .
Unpin a screen
Touch & hold and at the same time.
If you required a pattern, PIN, or password when you pinned the screen, enter it to unlock the phone.