The fastest way to change your background depends on your operating system

On Windows, right-click any empty space on your desktop, select Personalize, then click Background in the left menu. Choose Picture, Solid color, or Slideshow, then pick what you want. On a Mac, open System Settings, go to Wallpaper, and click the image you prefer. Both take under a minute and require no additional software.

The steps differ slightly between Windows 10, Windows 11, and macOS versions, but the principle is the same: you access a settings menu, choose a category, and select an image. If you want to use your own photo instead of a built-in option, both systems let you browse to a file on your computer.

Key Takeaways

  • Windows users right-click the desktop, select Personalize, then Background to change the image in seconds.
  • Mac users open System Settings, navigate to Wallpaper, and click any image to set it as the background.
  • Both operating systems include built-in image libraries, but you can also upload your own photos from your computer.
  • You can set different backgrounds for each monitor if you use multiple displays on either system.

Changing your background on Windows 10 and Windows 11

Right-click any blank area of your desktop—not on an icon or file. A menu appears. Click Personalize at the bottom. A Settings window opens. On the left side, you will see a menu with options like Background, Colors, and Lock screen. Click Background.

Under "Personalize your background," you will see three choices: Picture, Solid color, or Slideshow. Most people choose Picture. Windows shows you a row of built-in images. Click any one to set it as your background when ready. If you want to use a photo from your computer, click Browse, navigate to the folder where your photo is stored, select it, and click Choose picture.

If you choose Slideshow, Windows will rotate through multiple images at an interval you set. If you choose Solid color, you pick a single color instead of an image. Both options work the same way: select what you want, and it applies right away.

Changing your background on Mac

Click the Apple menu in the top-left corner and select System Settings (or System Preferences on older macOS versions). In the sidebar on the left, look for Wallpaper and click it. A grid of built-in wallpapers appears, organized by category like Nature, Solid Colors, and Dynamic.

Click any image to set it as your desktop background. The change happens when ready. If you want to use your own photo, click the + button at the bottom of the window, browse to the photo on your computer, and select it. You can also drag a photo directly from Finder into the wallpaper window.

On newer Macs, you can set different wallpapers for different Spaces (virtual desktops). You can also choose whether the wallpaper appears on your desktop, your lock screen, or both. These options appear in the same Wallpaper settings window.

Using your own photos as a background

Both Windows and Mac let you pick any image file from your computer. The image should be in a common format: JPG, PNG, or BMP work on both systems. If your photo is in a different format, you can open it in a photo editor or online converter and save it as JPG or PNG first.

On Windows, the image will stretch, fit, or tile depending on your choice in the Background settings. Look for a dropdown that says Choose a fit and pick Fill (stretches to fill the screen), Fit (shows the whole image without stretching), or Tile (repeats the image). On Mac, the system automatically scales the image to fit your screen without distorting it.

If you use a very large or very small image, the result may look blurry or pixelated. For best results, use a photo that matches your screen resolution or is larger. Most modern phones and cameras take photos large enough to work well as backgrounds.

Setting different backgrounds for multiple monitors

If you have two or more monitors connected to your computer, you can set a different background on each one. On Windows 11, right-click the desktop, select Personalize, then Background. Click any image, and a menu appears asking which monitor to explore it to. Select the monitor you want and click Set. Repeat for each monitor.

On Windows 10, the process is similar but the menu layout differs slightly. After selecting an image, look for an option to choose which display gets that background. On Mac, you can set different wallpapers for each Space, but not for each physical monitor in the same way. If you want different images on two Mac monitors, you will need to use third-party software.

Troubleshooting common background problems

If your background does not change after you select a new image, try closing and reopening the Settings window. On Windows, you can also restart your computer. If a photo you uploaded does not appear, check that the file is in a supported format (JPG, PNG, or BMP) and that the file is not corrupted. Try opening the photo in an image viewer first to confirm it works.

If your background looks stretched or distorted, adjust the "fit" setting on Windows. On Mac, try a different image to see if the problem is specific to that photo. If the background keeps reverting to the default after restart, a Windows update may have reset it—just change it again and it should stay.

On some older computers or with certain graphics drivers, slideshow backgrounds may slow down your system. If your computer feels sluggish after enabling a slideshow, switch back to a single image instead.

Frequently Asked Questions

Can I use a video or animated GIF as my background?

Windows 11 supports animated wallpapers through the Microsoft Store, but you need to read them as apps rather than uploading your own video file. Mac does not support video backgrounds on the desktop, though you can set animated wallpapers from the built-in library. For both systems, a static image is the most straightforward option.

Will changing my background slow down my computer?

A single image background has no noticeable effect on performance. Slideshows use slightly more resources because the system is constantly switching images, but the impact is minimal on modern computers. If you notice slowness, disable the slideshow and use a single image instead.

Where do I find the built-in backgrounds stored on my computer?

On Windows, they are usually in C:\Windows\Web\Wallpaper. On Mac, they are in /Library/Desktop Pictures. You can browse to these folders and use any image you find there, but the easiest way is to select them through Settings.

Can I set a background that changes based on the time of day?

Windows 11 includes dynamic wallpapers that shift throughout the day. Select Dynamic in the Background settings and choose one. Mac also offers dynamic wallpapers in the Wallpaper settings. Both update automatically without any action from you.

What happens to my background if I update my operating system?

Your custom background usually stays in place after an update. However, some major updates reset the background to the default. If this happens, straightforward change it again through Settings. Any photos you uploaded to your computer remain there and can be reapplied.