The fastest way to change your desktop picture

On Windows, right-click any empty space on your desktop, select Personalize, then click Background. Choose a picture from the built-in collection, or click Browse to use a photo you already have saved. On Mac, open System Settings, go to Wallpaper, and click the image you want, or drag a photo from your computer into the preview area. Both take about 30 seconds.

If you want your picture to change automatically on a schedule, both operating systems let you set that up in the same menu — Windows calls it a slideshow, and Mac calls it a dynamic wallpaper or a rotating collection. You can also set different pictures for each monitor if you have more than one.

Key Takeaways

  • Windows: right-click the desktop, select Personalize, click Background, and choose or browse for a picture.
  • Mac: open System Settings, go to Wallpaper, and click or drag the image you want.
  • Both systems let you set pictures to rotate automatically on a schedule you choose.
  • You can use any photo saved on your computer, or pick from the built-in collections that come with your operating system.
  • If you have multiple monitors, you can set a different picture on each one.

Where to find pictures to use

Your computer comes with a built-in collection of images. On Windows, these are in the Personalize menu under Background — scroll through the options labeled "Windows Spotlight," "Solid colors," or "Pictures." On Mac, System Settings shows collections like Nature, Landscapes, and Abstract right in the Wallpaper section.

You can also use any photo you have saved on your computer. If the photo is in your Pictures folder, Downloads folder, or anywhere else on your hard drive, click Browse (Windows) or drag it into the preview (Mac) and it will become your desktop picture. Many people use family photos, screenshots, or images they downloaded from the internet.

If you want new pictures, you can download them from free image sites like Unsplash, Pexels, or Pixabay. Download the image to your computer, then follow the steps above to set it as your background.

Setting pictures to change automatically

On Windows, after you click Background in Personalize, look for the dropdown that says Personalize your background. Select Slideshow instead of Picture. Then choose a folder that contains multiple pictures — Windows will cycle through them. You can set how often it changes (every 1 minute, 10 minutes, 1 hour, or 1 day) and whether it changes when your computer is plugged in, on battery, or both.

On Mac, open System Settings, go to Wallpaper, and look for collections that say "Dynamic" or show multiple images. Click one, and it will rotate through those images on a schedule. Some dynamic wallpapers also change based on the time of day — for example, showing a sunrise in the morning and sunset in the evening.

If you want to use your own photos in a rotating slideshow on Mac, create a folder with the photos you want, then drag that folder into the Wallpaper settings. Mac will cycle through them automatically.

Using different pictures on multiple monitors

If you have two or more monitors connected to your computer, you can set a different picture on each one. On Windows, right-click the desktop and select Personalize, then go to Background. At the bottom, you will see a dropdown that says Choose a fit — change this to Span if you want one picture to stretch across all monitors, or leave it as Fill to use separate pictures. Then right-click each monitor's screen individually and set its own picture.

On Mac, open System Settings and go to Wallpaper. Click on each monitor's preview at the top, and select a different image for each one. The changes take effect immediately.

Troubleshooting when the picture won't change

If you set a new picture but your desktop still shows the old one, restart your computer. Sometimes Windows or Mac needs to refresh to display the change. If that does not work, make sure the image file is not corrupted — try opening it in a photo viewer first to confirm it displays correctly.

On Windows, if you are using a work or school computer, your IT department may have locked the desktop picture so it cannot be changed. Check with them before assuming something is broken. On Mac, if you are using a managed account, parental controls or security settings might prevent changes — check System Settings under General or Privacy & Security.

If you downloaded a picture and it will not show up in the Browse menu, make sure it is saved in a location your computer can read — your Pictures folder, Downloads folder, or Desktop are the easiest. Some image formats (like very old or unusual file types) may not work; try using a common format like JPG or PNG instead.

Changing your lock screen picture separately

Your lock screen (the image you see before you log in) is separate from your desktop picture. On Windows, go to Settings, then Personalization, then Lock screen. You can choose a picture, slideshow, or Windows Spotlight image just like you do for the desktop. On Mac, the lock screen and desktop picture are usually the same, but you can change them independently by going to System Settings > General > Login Items and adjusting the appearance there.

Many people like to use a different picture on their lock screen than on their desktop — for example, a professional photo on the lock screen and something more personal on the desktop.

Frequently Asked Questions

Can I use a picture from the internet as my desktop background?

Yes. Right-click the image on a website, select Save image as, and save it to your computer. Then follow the steps above to set it as your background. Make sure you have permission to use the image — many images online are copyrighted, though sites like Unsplash and Pexels offer free images you can use.

What size picture works best for my desktop?

The best size matches your monitor's resolution. Most modern monitors are 1920 × 1080 pixels or higher. If your picture is smaller, it may look blurry or pixelated when stretched. If it is larger, your computer will shrink it automatically. You can find your monitor's resolution in Windows Settings or Mac System Settings under Display.

Why does my slideshow keep stopping?

On Windows, make sure the folder you selected for the slideshow actually contains image files. If you moved or deleted the images, the slideshow will stop. On Mac, check that the folder permissions allow your user account to read the files. Restarting your computer usually fixes temporary glitches.

Can I set a video as my desktop background?

Windows does not support video backgrounds natively, though some third-party apps offer this. Mac does not either. Both systems support animated GIFs in some cases, but results vary. Sticking with still images is the most reliable approach.