The quickest way to change your background

On Windows, right-click any empty space on your desktop and select Personalize. Click Background on the left side. Choose Picture from the dropdown menu, then click Browse to pick an image from your computer. On a Mac, open System Settings, click Wallpaper, select a category on the left, and click any image to explore it. Both take about 30 seconds.

If you want to use your own photo instead of a built-in image, the process is nearly identical — you just navigate to the folder where your photo lives instead of using the pre-loaded options. Windows stores suggested images in a default folder, but you can point it anywhere on your hard drive.

Key Takeaways

  • Windows users right-click the desktop, select Personalize, then Background to change the image in under a minute.
  • Mac users open System Settings, click Wallpaper, and select from built-in images or their own photos.
  • You can use any image file on your computer — Windows accepts JPG, PNG, and BMP files; Mac accepts JPG, PNG, HEIF, and TIFF.
  • If your image looks stretched or cut off, Windows lets you choose how it fits: fill, fit, stretch, tile, or center.
  • Both operating systems let you set different backgrounds for each monitor if you use multiple displays.

Changing the background on Windows 10 and Windows 11

Start by right-clicking on any empty area of your desktop — not on a file or folder, but on the blank desktop itself. A menu will appear. Look for the word Personalize near the bottom and click it. This opens the Settings window directly to the personalization section.

On the left side of the window, you will see a menu with several options. Click Background. A dropdown menu will appear that says Personalization at the top. Click the dropdown and select Picture. Windows will show you a row of suggested images. If none of these appeal to you, click the Browse button to open a file picker.

Navigate to the folder where your image is stored. This might be your Pictures folder, Downloads folder, or anywhere else you have saved a photo. Click the image once to select it, then click Choose picture at the bottom right. The image will appear on your desktop when ready. You can close the Settings window now — the change is already saved.

If your image looks stretched, squashed, or leaves blank space around the edges, scroll down in the Background section to find Choose a fit. Your options are Fill (stretches to cover the whole screen), Fit (shows the whole image without stretching), Stretch (distorts the image to fill the screen), Tile (repeats the image), or Center (puts the image in the middle with blank space around it). Most people prefer Fill or Fit.

Changing the background on a Mac

Click the Apple menu in the top left corner and select System Settings. (On older Macs running Monterey or earlier, this is called System Preferences.) In the Settings window, look for Wallpaper in the left sidebar and click it.

The main panel will show categories of built-in wallpapers — Collections, Dynamic, Light, Dark, and others depending on your macOS version. Click any category to see the images inside. Click an image once to preview it, then click again to explore it. The change takes effect when ready.

To use your own photo, look for an option called Add or a plus sign near the bottom of the wallpaper list. Click it and navigate to your photo. You can also drag a photo directly from Finder into the wallpaper list. Once you select your photo, it will appear on your desktop right away.

If you have multiple monitors connected to your Mac, you can set a different wallpaper for each one. After selecting a wallpaper, look for options to choose which display it applies to — usually shown as a dropdown or set of buttons near the preview.

Using photos from your computer as a background

Both Windows and Mac work best with image files in common formats. Windows accepts JPG, PNG, and BMP files. Mac accepts JPG, PNG, HEIF, and TIFF files. If you have a photo in a different format — like GIF or WebP — you can convert it using free online tools or image editing software, but most photos you take with a phone or camera will already be in one of these formats.

When you browse for an image, navigate to wherever you store your photos. Common locations are the Pictures folder, Downloads folder, or a folder you created yourself. If you have photos organized in subfolders, you can click through them just like any other file browser. Select the photo you want and confirm your choice.

Keep in mind that very small images may look blurry or pixelated when stretched across a large monitor. For best results, use an image that is at least as wide and tall as your monitor's resolution. You can check your monitor's resolution in Windows by right-clicking the desktop and selecting Display settings, or on a Mac by clicking the Apple menu, selecting System Settings, then Displays.

Setting different backgrounds for multiple monitors

If you have two or more monitors connected to your PC, Windows lets you assign a different background to each one. Open the Background settings as described above. Instead of just picking one image, you will see options to choose which monitor gets which image. Click on each monitor in the preview and select a different image for it.

On a Mac with multiple displays, the process is similar. Open Wallpaper settings, select your background, and look for a dropdown or buttons showing which display the wallpaper applies to. Select each display and choose its background separately. Some Macs also let you create a single wallpaper that spans across both monitors — this option appears in the same menu.

Troubleshooting common background problems

If your background image does not appear or reverts to the default, the most common cause is that Windows or Mac cannot read the file. Make sure the image is in a supported format (JPG, PNG, or BMP for Windows; JPG, PNG, HEIF, or TIFF for Mac). If you downloaded the image from the internet, try right-clicking it and selecting Save image as to save a fresh copy to your computer, then try again.

If the image looks wrong — stretched, cut off, or showing only part of the photo — adjust the fit setting. In Windows, this is the Choose a fit dropdown in Background settings. Try Fit first, which shows the entire image without distortion. If that leaves blank space and you prefer the image to fill the screen, switch to Fill.

If you cannot find the Personalize option on Windows, make sure you are right-clicking on the desktop itself, not on the taskbar at the bottom. The taskbar has its own right-click menu. Similarly, on a Mac, if System Settings does not show a Wallpaper option, check that you are running a recent version of macOS — very old versions use a different menu structure.

Frequently Asked Questions

Can I set a video or animated background instead of a still image?

Windows 11 offers a small selection of animated wallpapers through the Personalize menu — look for the Video option in the Background dropdown. Mac does not have a built-in animated wallpaper feature, but you can read third-party apps from the Mac App Store that provide this. Both systems use more battery power with animated backgrounds, so consider this if you use a laptop.

What happens if I delete the image file after setting it as my background?

If you delete the original image file, your background will disappear or revert to a default image the next time you restart your computer. To keep a background permanently, leave the image file in its original location. If you want to move or rename the file, change your background to a different image first, then move the file safely.

Can I schedule my background to change automatically?

Yes. On Windows, go to Background settings and look for Choose albums for your background or Slideshow. Select a folder with multiple images and set how often you want the background to change — every minute, every hour, every day, or when you log in. On a Mac, open Wallpaper settings, select a category, and check the box for Change picture, then choose your interval.

Why does my background look different on my monitor than on my laptop screen?

Different monitors have different aspect ratios and resolutions, so the same image may look stretched on one and properly proportioned on another. If you use both a desktop monitor and a laptop, you can set different backgrounds for each by assigning them separately in your background settings. Alternatively, choose an image with a neutral composition that looks acceptable at any ratio.

Can I use a background from the internet without downloading it first?

No — both Windows and Mac require the image to be saved on your computer before you can set it as a background. Right-click any image on a website and select Save image as (or Save picture as on some browsers). Choose a folder like Pictures or Downloads, then follow the steps above to set it as your background.