The quickest way to change your lock screen picture
On most phones and computers, you can change your lock screen picture in under a minute by opening your device's settings, finding the display or personalization section, and selecting a new image from your photo library or the built-in options. The exact steps depend on whether you use an iPhone, Android phone, Windows computer, or Mac — each has its own menu path, but the process is similar across all of them.
You do not need any special software or technical knowledge. The image you choose should be something you want to see every time you unlock your device, so pick something that is clear and meaningful to you rather than something too small or dark to see at a glance.
Key Takeaways
- iPhone users go to Settings > Display & Brightness > Lock Screen, tap Customize, and choose an image from Photos or the built-in collections.
- Android users open Settings > Display > Lock Screen or Wallpaper, select Choose Image, and pick a photo from their gallery or system images.
- Windows computer users right-click the desktop, select Personalize > Lock Screen, and choose an image or slideshow from the options.
- Mac users go to System Settings > Lock Screen, click the image preview, and select a new photo from their library or iCloud.
- The image you select will appear every time someone tries to unlock your device, so choose something you will want to see repeatedly.
How to change lock screen on iPhone
Open the Settings app and tap Display & Brightness. Scroll down and select Lock Screen. You will see your current lock screen image at the top of the screen. Tap the Customize button below it.
A menu will appear showing your current lock screen design. Tap the image preview itself to change the picture. You can choose from Photos (your own images), Suggested Photos (images Apple thinks might work well), or built-in collections like Weather, Astronomy, or Emoji. Select the image you want, adjust the style or filters if you wish, and tap Set as Lock Screen at the bottom.
If you want to use a photo from your library, tap Photos, then browse to find the image. You can crop it by pinching and dragging, then confirm your choice. The new image will appear the next time your phone locks.
How to change lock screen on Android
Open Settings and scroll down to find Display or Display and Brightness (the exact name varies by manufacturer). Tap Lock Screen or Wallpaper. You may see options for Lock Screen Style, Lock Screen Wallpaper, or similar — tap the one that lets you change the image.
Select Choose Image or Browse. Your phone will open a file picker showing your photo library, recent images, or built-in wallpaper collections. Pick the image you want and tap Set or Confirm. Some Android phones let you preview the image on your lock screen before confirming — if you see a preview option, use it to make sure the image looks the way you want.
If your phone has a dedicated Wallpaper app (Samsung phones often do), you can also open that app directly, select Lock Screen, and follow the same steps. The change takes effect when ready.
How to change lock screen on Windows
Right-click on an empty area of your desktop and select Personalize from the menu. In the Settings window that opens, click Lock Screen on the left side. You will see your current lock screen image displayed at the top.
Under "Personalize your lock screen," you will see a dropdown menu that says "Windows Spotlight," "Picture," or "Slideshow." If it is set to Windows Spotlight (which rotates images automatically), click the dropdown and select Picture instead. Then click the image preview or the Browse button below it to choose a new image from your computer.
A file browser will open. Navigate to the folder where your photos are stored (usually Pictures), select the image you want, and click Choose Picture. The new image will appear the next time your computer locks. If you prefer a rotating set of images instead of a single picture, select Slideshow from the dropdown and choose a folder containing multiple photos.
How to change lock screen on Mac
Click the Apple menu in the top-left corner and select System Settings. Click Lock Screen in the sidebar on the left. You will see a preview of your current lock screen image in the center of the screen.
Click the image preview itself. A window will open showing your photo library, iCloud photos, and built-in collections. Browse to find the image you want and click it once to select it. The preview on the left will update to show how it will look. Click Set to confirm your choice.
If you want to use a photo that is not in your library, you can drag and drop an image file directly onto the preview window, or click the plus button to browse your computer for a file. The new lock screen image will appear the next time your Mac locks.
Choosing an image that works well as a lock screen
The best lock screen images are clear and visible even when your screen brightness is low. Avoid images that are mostly dark, have small details, or contain text you need to read — your lock screen will appear for only a few seconds, and you want to recognize it at a glance.
Images with a single subject (a person, landscape, or object) tend to work better than busy or cluttered photos. Solid colors or straightforward patterns are also good choices if you prefer something minimal. If you use a lock screen with widgets or clock information (available on newer iPhones and some Android phones), make sure your image does not have text or important details in the areas where those elements will appear.
Remember that anyone who picks up your device will see this image, so choose something you are comfortable with other people seeing. You can change it again anytime using the same steps, so do not worry about making a permanent choice.
Troubleshooting if your lock screen picture will not change
If you have followed the steps but your lock screen image has not updated, try restarting your device. Power it off completely, wait a few seconds, and turn it back on. This usually fixes minor glitches that prevent changes from taking effect.
On iPhone, if you are using a lock screen style that does not support custom images (such as Weather or Astronomy), you will need to switch to a style that does. Go back to Settings > Display & Brightness > Lock Screen, tap Customize, and select a different design before trying to change the image.
On Android, check that you have given the Settings app permission to access your photos. Go to Settings > Apps > Permissions > Photos, find Settings in the list, and make sure it has permission to access your photo library. On Windows, make sure the image file is not corrupted and is in a format your computer recognizes (JPG, PNG, and BMP are standard). On Mac, try dragging the image directly onto the lock screen preview instead of using the browse button.
Frequently Asked Questions
Can I use a screenshot as my lock screen picture?
Yes. Screenshots are saved to your photo library just like any other image. Find the screenshot in your Photos or Gallery app and follow the same steps to set it as your lock screen. The image will be cropped or resized to fit your lock screen dimensions, so preview it first to make sure it looks the way you want.
Will changing my lock screen picture affect my home screen or wallpaper?
No. Your lock screen picture, home screen wallpaper, and desktop background are separate settings. Changing one does not change the others. You can set them all to different images if you want, or use the same image for all of them.
Can I set a video or animated image as my lock screen?
On newer iPhones (iOS 16 and later), you can use animated wallpapers or live photos as your lock screen. On Android, some phones support animated wallpapers through third-party apps or built-in options — check your device's wallpaper settings. Windows and Mac do not support video lock screens, though Windows does support slideshow mode with multiple images.
What if I want my lock screen to rotate through multiple pictures?
On Windows, select Slideshow instead of Picture in the lock screen settings and choose a folder with multiple images. On Mac, you can set up a rotating lock screen using the same image selection window. On iPhone and Android, the built-in options do not rotate lock screen images, but some phones offer this through their wallpaper apps or third-party apps.
Does changing my lock screen picture use storage space?
No. Your device is straightforward displaying an image that already exists in your photo library — it is not creating a copy or using extra storage. The lock screen setting itself takes up only a tiny amount of space (a few kilobytes at most).