The fastest way depends on your operating system

On Windows 10 or 11, 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. The change takes effect immediately.

On Mac, click the Apple menu, go to "System Settings" (or "System Preferences" on older versions), select "Wallpaper," then click the "Desktop" tab. Choose a category on the left, click an image, and it updates right away.

Both methods take under a minute. If you want to use your own photo instead of built-in images, the process is nearly identical — you just browse to the file on your computer instead of picking from a preset folder.

Key Takeaways

  • Windows users right-click the desktop, select Personalize, then Background to change the image or color.
  • Mac users open System Settings, go to Wallpaper, click the Desktop tab, and select from available options.
  • You can use your own photos by browsing to them during the personalization process instead of choosing preset images.
  • Slideshow mode cycles through multiple images automatically on both Windows and Mac.
  • Changes take effect immediately and do not require restarting your computer.

Changing the background on Windows 10 and 11

Start by right-clicking any blank area of your desktop — avoid clicking on icons or the taskbar. A menu will appear with several options. Look for "Personalize" near the bottom and click it. A Settings window opens.

On the left side of the Settings window, you will see a menu. Click "Background." You now have three choices: Picture, Solid color, or Slideshow. If you choose "Picture," Windows shows you folders of built-in images organized by category — Nature, Abstract, Landscapes, and others. Click any image to preview it, then click it again to set it as your background.

If you want to use a photo you took yourself, click "Browse" under the Picture option. Navigate to the folder where your photo is saved, select it, and click "Choose this image." The photo becomes your new background immediately. You can also adjust how the image fits — "Fill," "Fit," "Stretch," "Tile," or "Center" — using the dropdown menu labeled "Choose a fit."

For a "Solid color" background, click that option and select from the color palette. For "Slideshow," pick a folder of images and set how often Windows switches between them — every 1 minute, 10 minutes, 30 minutes, or 1 hour.

Changing the background on Mac

Click the Apple menu in the top-left corner of your screen. On newer Macs (Ventura and later), select "System Settings." On older Macs, select "System Preferences." Either way, a window opens with many options.

Look for "Wallpaper" in the sidebar and click it. You will see a "Desktop" tab at the top — make sure it is selected. On the left side, you will see categories like "Collections," "Recent," and specific folders like "Nature," "Solid Colors," or "Dynamic." Click any category to see the images inside it. Click an image to preview it, and it becomes your background immediately.

To use your own photo, click "Recent" or navigate to the folder where your image is stored. You can also drag a photo directly from Finder onto the wallpaper preview. Mac automatically crops or fits the image to your screen size.

Using your own photos as the background

Both Windows and Mac let you set any photo on your computer as the background. The photo does not have to be in a special folder — it can be anywhere you have saved it.

On Windows, open Personalize, click Background, select "Picture," then click "Browse." Navigate to the folder containing your photo — usually "Pictures" or "Downloads" — select the image, and click "Choose this image." You can then adjust how it fits using the dropdown menu.

On Mac, open System Settings, go to Wallpaper, click Desktop, then look for "Recent" or click the folder icon to browse. Find your photo and click it. If you want to use a photo that is not showing up, you can drag it directly from Finder into the wallpaper preview area.

Keep in mind that very small images may look blurry if stretched to fill your screen, and very large images may take longer to load. A photo that is at least 1920 by 1080 pixels works well on most modern monitors.

Setting up a slideshow background

A slideshow background cycles through multiple images automatically, changing at an interval you choose. This works on both Windows and Mac.

On Windows, open Personalize, click Background, then select "Slideshow" from the dropdown menu. Click "Browse" and choose a folder that contains multiple images. Then set the interval — how often the image changes — using the "Change picture every" dropdown. You can pick 1 minute, 10 minutes, 30 minutes, 1 hour, 1 day, or 1 week. You can also choose whether the images shuffle randomly or play in order.

On Mac, open System Settings, go to Wallpaper, click Desktop, then select a dynamic wallpaper or a folder of images. Mac automatically cycles through them. You cannot adjust the interval on Mac the way you can on Windows — the timing is set by the wallpaper itself.

Troubleshooting background changes that do not stick

Occasionally a background change does not save, or it reverts to the default after restart. This usually happens if Windows or Mac is applying a group policy, or if you do not have permission to change settings on that user account.

On Windows, make sure you are logged in as an administrator. Right-click Personalize and select "Run as administrator" if you are not sure. If the background still will not change, try selecting a built-in image first to confirm the feature works, then try your own photo again.

On Mac, open System Settings, go to Wallpaper, and confirm you are in the Desktop tab, not the Lock Screen tab. If you are trying to use a photo from an external drive, move it to your Pictures folder first — Mac sometimes has trouble accessing external drives for wallpapers.

Changing the lock screen background separately

On newer versions of both Windows and Mac, you can set a different image for your lock screen — the screen you see before you log in.

On Windows 11, open Personalize, click "Lock screen" in the left menu, then choose Picture, Slideshow, or Windows Spotlight (which rotates Microsoft's curated images). The process is the same as changing the desktop background.

On Mac, open System Settings, go to Wallpaper, then click the "Lock Screen" tab at the top. Select an image the same way you would for the desktop. You can have a completely different image on your lock screen and your desktop.

Frequently Asked Questions

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

Windows and Mac do not support video or animated GIF files as desktop backgrounds through the built-in settings. However, Windows does offer "dynamic" wallpapers that animate slightly, and Mac has dynamic wallpapers that change based on time of day. Third-party software exists for both systems if you want full video backgrounds, but it requires additional installation.

Why does my background look blurry or stretched?

This usually means the image resolution is smaller than your screen resolution. If your image is 1024 by 768 pixels but your monitor is 1920 by 1080, Windows or Mac has to enlarge it, which makes it look fuzzy. Use the "Fit" option instead of "Fill" or "Stretch" to avoid this, or find a higher-resolution version of the image.

Can I set different backgrounds on multiple monitors?

Windows 11 allows this — right-click the desktop, select Personalize, click Background, and you will see an option to choose different images for each monitor. Mac does not have a built-in way to set different wallpapers on different monitors, though some third-party apps offer this feature.

Does changing the background affect my computer's performance?

No. A static image uses almost no system resources. A slideshow uses slightly more because the computer has to load new images periodically, but the impact is negligible on any modern computer. Dynamic or animated wallpapers use more resources than static ones, but still very little.

What file types work for custom background images?

Both Windows and Mac accept JPG, PNG, BMP, and GIF files. JPG is the most common format for photos. PNG works well if you want transparency or lossless quality. Avoid very old formats like TIFF unless you know your system supports them.