Samsung Galaxy S10 5G - Turn One-Handed Operations On / Off
Notes:
Enabling one-handed operation adjusts screen size and layout for easy controlling of the device with one hand.
For first-time setup, hold device in one hand then quickly slide thumb from the edge of the screen to the middle and back.
From a Home screen, swipe up or down from the center of the display to access the apps screen. These instructions only apply to Standard mode and the default Home screen layout.
Navigate: Settings > Advanced features.
Tap Motions and gestures.
Tap One-handed mode.
Tap the One-handed mode switch (upper-right) to turn on or off .
When on, select the desired option from the 'Reduce screen size by using' section: