howtosimply.com/guides/how-to-use-one-handed-mode-on-a-samsung-galaxy/ · Checked October 2026 · Samsung Galaxy A57 5G (One UI 8.5, Android 16) and Samsung Galaxy A57 (One UI 9, Android 17 (build A576BXXU6BZIE))

In this guide

Open Advanced features
Switch it on
Choose how to start it
Use it
If you do not see this option
If this does not work
Good to know
Sources

Quick answer

Open Settings, Advanced features, One-handed mode and switch it on. Then choose Gesture (swipe down in the centre of the bottom edge) or Button (double tap the Home button) to shrink the screen so you can reach the top with your thumb.

3 of 4 steps with real screenshots · 2 official sources below

Device: Android
Shown on: Samsung Galaxy A57 5G (SM-A576B), One UI 8.5, Android 16, Samsung Galaxy A57 (SM-A576B), One UI 9, Android 17 (build A576BXXU6BZIE)
App: Settings
Path: Settings › Advanced features
Real screenshots: 3 of 4 steps
What we did: Performed: we made the change on our device and show the result
Our phone: Shown on Galaxy A57, One UI 8.5
Checked: October 2026
Sources: 2 official, linked below

Step by step

Open Advanced features
Open Settings and tap Advanced features. One-handed mode has its own switch there.
Done
Switch it on
Settings, Advanced features. Turn on the switch next to One-handed mode. Ours is Off.
Done
Choose how to start it
Under Reduce display size with, Gesture means swiping down in the centre of the bottom edge of the screen. Button means double tapping the Home button. The options can be chosen once the switch is on.
On ours, Gesture was selected when we switched it on. We switched it back off afterwards.
Done
Use it
Do the gesture or double tap. The screen shrinks; tap the empty area outside it to go back to full size.
Done

If you do not see this option

Your phone has no One-handed mode under Advanced features Google Android phones without Samsung menus have it under Settings: search for One-handed mode and turn on Use One-handed mode. Google says it needs Android 12 or later. Source: Use one-handed mode
You want it in the quick panel Google says one-handed mode can also be set as an Accessibility shortcut and added to Quick Settings. Source: Use one-handed mode

If this does not work

The screen does not shrink Samsung says the action depends on what you chose: swipe down in the centre of the bottom edge for Gesture, or double tap the Home button for Button. If you use swipe gestures there is no Home button, so choose Gesture. Source: Using One Handed Mode on my Samsung Phone
The small window is on the wrong side or too small Samsung says an icon on the small window moves it to the other side, and dragging the blue dot at its top corner changes its size. Tap the empty space outside it to go back. Source: Using One Handed Mode on my Samsung Phone

About this guide

On a big phone the top of the screen is out of reach of your thumb. One-handed mode temporarily scales the display down to a corner. We switched one-handed mode on for one picture and back off afterwards.

Step 3 is from the same phone after its One UI 9 update (Android 17).

Good to know

Gesture fits gesture navigation and Button fits the three navigation buttons. If one does nothing, try the other or check your navigation bar setting.

In short: Settings, Advanced features, One-handed mode on. Gesture: swipe down at the bottom centre. Button: double tap Home.

Sources

Links checked in October 2026. Menus and features can change after software updates. These steps match the version named at the top.