How to adjust your phone's screen brightness
A screen that is too dark is hard to read; a screen that is too bright tires your eyes and drains the battery. Brightness can be adjusted in one gesture.
On an Android phone
- 1Swipe down from the top of the screen to open the quick settings panel.
- 2At the top, a bar with a sun ☀️ controls the light.
- 3Slide it to the right to brighten, to the left to darken.
- 4Tap anywhere below the panel to close it.
On an iPhone
- 1Open Control Centre by swiping down from the top-right corner.
- 2Slide the bar with the sun ☀️ up or down.
Good to know: If the screen changes brightness on its own, that's auto-brightness. It adapts to the light in the room and can be turned off in the display settings.
See also
Page updated in October 2026. Menu names may vary slightly depending on your phone's brand and model.