One-handed mode temporarily shrinks the screen so top buttons, menus, and icons are easier to reach with one thumb. It is especially helpful on large phones and foldables used one-handed.
These steps apply to Samsung Galaxy phones with One UI and other Android phones that include one-handed or reachability-style gestures.
Does This Affect You?
Use this if you cannot comfortably reach the top of the screen without shifting your grip or using your other hand.
Turn On One-Handed Mode on Samsung
- Open Settings.
- Tap Advanced features.
- Tap One-handed mode.
- Turn it on.
- Choose a trigger: swipe down from the bottom edge, or double-tap Home if you use button navigation.
- Use the trigger to shrink the screen.
- Tap outside the small window to return to full size.
Turn It On on Other Android Phones
- Open Settings > System > Gestures.
- Look for One-handed mode, Reachability, or similar.
- Turn it on if available.
- Trigger it by swiping down along the bottom gesture area.
- Swipe up or tap outside the shrunken area to restore full size.
Useful One-Handed Mode Notes
Move the Window
Look for an arrow on the side of the shrunken screen. Tapping it moves the window to the other corner for left-hand or right-hand use.
Timeout Settings
Samsung may offer a timeout that returns the screen to full size after a period of inactivity. Check One-handed mode settings if it closes too soon or stays too long.
Some Apps Ignore It
Games, camera views, and full-screen video apps may stay full size. That is app behavior, not necessarily a phone problem.
Not Every Phone Has It
If the setting is missing, check for a phone update or a similarly named accessibility gesture. Third-party launchers can add similar behavior, but they require extra trust.
Sources
- Samsung Support: Use one-handed mode on Galaxy phones
- Google Support: Android accessibility features
- Android Help Center: Navigation gestures