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You can adjust the screen reachability for easier one hand phone operation.
1. 1. Find "Accessibility"
2. 2. Turn on Reachability
Press the indicator next to "Reachability" to turn on the function.
3. 3. Save setting
Press the Home key to return to the home screen.
4. 4. Adjust screen reachability
Touch the Home key twice in quick succession and the upper part of the screen shifts down.