Backlight & display: Microsoft Lumia 640

Learn how to customize the display and adjust the backlight on the Microsoft Lumia 640.

 

 

 

Backlight: Change brightness

  1. From the Start screen, touch the screen and slide left.
  2. Tap Settings > brightness.
  3. Tap the Automatically adjust slider to turn it on or off.
  4. If Automatically adjust is off, you may tap the Level field and select one of the following:
    • low
    • medium
    • high

 

Backlight: Timeout

  1. From the Start screen, touch the screen and slide left.
  2. Scroll to and tap Settings.
  3. Tap lock screen.
  4. Tap Screen times out after.
  5. Tap to select a timeout option.

 

Wallpaper: Home screen

  1. Swipe left on the start screen.
  2. Scroll to and tap Settings.
  3. Tap start+theme.
  4. Tap Background, then choose light or dark.
  5. Tap Accent color, then choose from available colors.
  6. Tap choose photo to set a photo as the screen background.
  7. Tap the Show more tiles slider to the On position to show more tiles.
  8. Tap the Show more tiles slider to the Off position to show fewer tiles.

 

Wallpaper: Lock screen

  1. On the start screen, swipe down from the top of the screen.

  2. Tap ALL SETTINGS > lock screen.
  3. Tap change photo.
  4. Choose photo location and tap desired photo or background.
  5. Adjust to get the best possible fit, and tap the check mark to save.