One-handed mode is a convenient design that allows one hand to reach the other end of the display area easily. When your other hand is inconvenient to operate the phone, you can use the phone with one hand and avoid the risk of dropping the phone.
Setting method
realme UI 7.0 & 6.0: Settings > Accessibility & convenience> One-handed mode
realme UI 5.0 & 4.0 & 3.0: Settings > System/Additional settings > One-handed mode
realme UI 2.0: Settings > Convenience tools > Navigation > Pull down to Enter One-Handed Mode
realme UI T & U Edition: Settings > System > Gestures
realme UI R & Go Edition: not support
Usage method
realme UI 3.0 and above versions: In portrait orientation, swipe down with one finger at the bottom of the screen to enter one-handed mode.
Swipe up with one finger at the bottom of the screen, tap the blank area at the top of the display, or the up arrow icon
to return to normal mode.
realme UI 2.0: In portrait orientation, pull down from the bottom of the screen to enter one-handed mode.
Click the bottom icon
to switch display from left to right.
Click the icon in the upper left corner 
to return to normal mode.
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