The fastest way depends on what device you're using

Changing your screen background takes less than a minute on any device, but the steps differ between Windows, Mac, iPhone, and Android. The process is built into your operating system — you don't need to download anything or restart. On a computer, you right-click the desktop or open Settings. On a phone, you open the lock screen or home screen settings and tap "Wallpaper." The hardest part is usually finding an image you want to use, not the change itself.

Every device lets you choose from built-in images or upload your own photos. You can also set different backgrounds for your lock screen and home screen on phones, or your desktop and lock screen on Windows 11. The change takes effect immediately once you confirm your choice.

Key Takeaways

  • Windows users right-click the desktop, select "Personalize," and choose from built-in images or upload your own photo.
  • Mac users go to System Settings, click "Wallpaper," and select from the library or drag in a photo from their computer.
  • iPhone users open Settings, tap "Wallpaper," then "Customize," and choose from Apple's collection or a photo in your library.
  • Android users long-press the home screen, tap "Wallpapers," and select from Google's collection or your own photos.
  • You can set different backgrounds for your lock screen and home screen on phones, or your desktop and lock screen on Windows 11.

Changing your background on Windows

On Windows 10 and 11, right-click anywhere on your desktop (the empty space, not on an icon or folder). A menu appears. Click "Personalize" at the bottom. This opens the Settings app to the Personalization section.

Click "Background" in the left sidebar. You'll see a dropdown menu that says "Personalize your background." Select "Picture" if you want a single image, "Slideshow" if you want multiple images to rotate, or "Solid color" for a plain background. If you choose "Picture," Windows shows you a gallery of built-in images. Click any one to preview it. If you want to use your own photo instead, click "Browse" and navigate to the file on your computer. Once you've selected an image, it applies immediately — you don't need to click "Save."

On Windows 11, you can also set a separate lock screen background. Go back to Settings, click "Lock screen" in the left sidebar, and follow the same steps. This lets you have one image on your desktop and a different one when your computer is locked.

Changing your background on Mac

Click the Apple menu in the top-left corner and select "System Settings" (or "System Preferences" on older versions). Click "Wallpaper" in the sidebar. A gallery of built-in images appears, organized by category — Nature, Solid Colors, Dynamic, and so on. Click any image to preview it, then click "Set Desktop Picture" to apply it.

To use your own photo, click "Add" (the plus sign) at the bottom of the sidebar, navigate to the image file on your computer, and click "Choose." The photo appears in your sidebar under "Custom" and applies to your desktop immediately. You can also drag an image file directly from Finder into the wallpaper window, which is often faster than using the Add button.

If you want a different background for your lock screen, click "Lock Screen" in the sidebar and repeat the process. This is useful if you want a professional image on your desktop but something more personal on your lock screen.

Changing your background on iPhone

Open Settings and scroll down to "Wallpaper." Tap it, then tap "Customize." You'll see two options: "Lock Screen" and "Home Screen." Choose which one you want to change first.

For the lock screen, tap "Lock Screen" and you'll see Apple's built-in wallpaper collection organized by style — Weather, Astronomy, Emoji, and so on. Tap any image to preview it. If you want to use a photo from your phone's library instead, tap "Photos" at the bottom, select an album, and choose the photo you want. Once you've selected an image, tap "Add" at the bottom right, then "Set as Lock Screen Wallpaper."

Repeat the same steps for your home screen by tapping "Home Screen" instead. You can set different images for each, or use the same one for both. The changes take effect immediately and you'll see them the next time you lock your phone or return to your home screen.

Changing your background on Android

Long-press (hold your finger down) on an empty area of your home screen for about two seconds. A menu appears at the bottom. Tap "Wallpapers." Google's wallpaper collection opens, organized by category — Nature, Abstract, Textures, and others. Tap any image to preview it full-screen.

If you want to use a photo from your phone's gallery instead, tap "My photos" at the bottom, select an album, and choose the image. Once you've selected an image, tap "Set wallpaper" and choose whether to apply it to your home screen, lock screen, or both. The change takes effect immediately.

On some Android phones (like Samsung), the steps may vary slightly. If you don't see a "Wallpapers" option, try opening Settings, searching for "Wallpaper," and tapping the result. Different manufacturers sometimes place this setting in different locations.

Using your own photos as a background

All devices let you upload a personal photo instead of using a built-in image. On computers, navigate to the photo file when the background settings open. On phones, tap "Photos" or "My photos" to browse your library. The photo will be cropped or scaled to fit your screen — you usually get a preview before you confirm, so you can see how it will look.

If your photo is very small or very large, it may look blurry or stretched. Photos taken with your phone's camera or downloaded from the internet usually work best. If you want to use a photo from a website, save it to your computer or phone first, then follow the steps above. Most devices work best with photos that are at least 1920 pixels wide on a computer or taken with a modern phone camera.

What to do if your background won't change

If you've followed the steps but the background didn't change, restart your device. On a computer, restart Windows or Mac normally. On a phone, turn it off and back on. This clears temporary files that might be blocking the change.

If the background still won't change after a restart, check that you have permission to modify settings. On Windows, make sure you're logged in as an administrator. On a phone, go to Settings and search for "Permissions" to confirm the system has access to your photos. If you're trying to use a photo from an external drive or cloud storage, move it to your computer or phone's main storage first — some devices can't use backgrounds from external sources.

Frequently Asked Questions

Can I set a different background for my lock screen and home screen?

Yes, on both phones and Windows 11. On iPhone, open Settings, tap "Wallpaper," then "Customize," and set them separately. On Android, after selecting an image, choose "Set wallpaper" and pick which screen to apply it to. On Windows 11, go to Settings, click "Lock screen," and set a different image than your desktop background.

What image formats work as backgrounds?

JPG, PNG, and GIF files work on all devices. Windows also accepts BMP and TIFF. Most photos from your phone's camera or downloaded from the internet are already in one of these formats. If you're unsure, right-click the file and check its name — the format is the three letters after the dot (like .jpg or .png).

Can I use a video as my background?

Windows 11 and some Android phones support video wallpapers, but iPhone does not. On Windows 11, go to Settings, click "Background," and select "Video" from the dropdown menu. On Android, some phones have a "Video" option in the wallpaper settings, though this varies by manufacturer.

Why does my background look different after I set it?

Your device may have cropped or scaled the image to fit your screen size. This is normal and happens automatically. If the result doesn't look right, try a different image or one with a different aspect ratio. You can also preview how an image will look before you confirm the change on most devices.

Do I need to download anything to change my background?

No. The background settings are built into your operating system. You only need to download something if you want to use an image from the internet — in that case, save the image file to your computer or phone first, then follow the steps above.