The quickest way to change your desktop picture

On Windows, right-click any empty space on your desktop, select Personalize, then click Background in the left menu. Choose Picture from the dropdown, click Browse, and select an image file from your computer. On Mac, open System Settings, go to Wallpaper, click the plus sign, and select a folder or image. On Linux, the steps vary by desktop environment, but usually involve right-clicking the desktop and selecting Change Background or opening Settings and finding the Appearance section.

The image you choose becomes the background behind your icons and taskbar. Your computer stores the setting even after you restart, so you only need to change it once unless you want something different later.

Key Takeaways

  • Windows users right-click the desktop, select Personalize, then Background to browse and select an image file.
  • Mac users open System Settings, navigate to Wallpaper, and choose from built-in images or folders on their computer.
  • You can use any image file on your computer — photos, downloaded pictures, or screenshots all work as desktop backgrounds.
  • The setting stays in place after you restart your computer unless you deliberately change it again.
  • If your image looks stretched or cut off, you can adjust how it fits using the sizing options in the same menu.

Finding and using images from your computer

Before you change your background, you need an image file. Common image types are .jpg, .png, and .bmp — these are the file extensions you see at the end of the filename. You may already have images on your computer: photos you took with a camera or phone, screenshots you saved, or pictures you downloaded from the internet.

To find images you have saved, open your file manager (called File Explorer on Windows or Finder on Mac). Look in folders like Pictures, Downloads, or Documents. If you do not have an image yet, you can read one from a free image site like Unsplash or Pexels, save it to your computer, and then use it as your background.

When you browse for an image in the personalization menu, navigate to the folder where your image is stored and click it once to select it. The preview should show you what the background will look like before you confirm the change.

Adjusting how your image fits the screen

After you select an image, you may see options for how it displays. The most common choice is Fill, which stretches the image to cover the entire screen. If your image is a different shape than your monitor, parts of it may get cut off on the sides or top and bottom.

Fit or Contain shrinks the image to show it completely without cutting anything off, but you may see colored bars on the sides or top. Tile repeats the image in a grid pattern if it is smaller than your screen. Center places the image in the middle and leaves the rest of the background a solid color.

If you do not like how the image looks with one setting, go back to the same menu and try a different option. There is no penalty for changing it multiple times while you decide what you prefer.

Using built-in backgrounds instead of your own images

Both Windows and Mac come with a collection of built-in backgrounds you can use without finding or downloading anything. On Windows, the Personalize menu shows a gallery of default images you can click to explore when ready. On Mac, the Wallpaper section displays Apple's built-in collections organized by category — landscapes, abstract designs, colors, and others.

These built-in options are already the right size for most screens and usually look polished without any adjustment needed. If you want to explore what is available before deciding on your own image, browsing the built-in gallery first can give you ideas about what style you prefer.

Changing your background on a work or school computer

Some computers managed by an employer or school have restrictions that prevent you from changing the desktop background. If you right-click and do not see Personalize, or if the Personalize menu is grayed out, your computer administrator has locked this setting.

You can ask your IT department or help desk whether they can unlock personalization for you, but they may decline for security or consistency reasons. If they do not allow it, you will not be able to change the background on that computer.

Troubleshooting when your change does not stick

If you set a background and it reverts to the default the next time you restart, your computer may not have saved the change. This sometimes happens if you do not have permission to modify settings on that user account. Try the process again and make sure you see the new image appear on the desktop before closing the settings menu.

If the image appears but looks wrong — stretched, blurry, or partially cut off — go back to the sizing options and try a different fit setting. If the image file itself is very small (less than 1 megabyte), it may look pixelated on a large monitor. In that case, choosing a larger image or using a built-in background usually produces better results.

Moving to a new computer or keeping multiple backgrounds

When you get a new computer, your background setting does not transfer automatically. You will need to repeat the process on the new machine. If you want to use the same image, copy it to a folder on the new computer first, then follow the same steps to set it as the background.

Some operating systems let you rotate through multiple backgrounds on a schedule. On Windows, you can select a folder of images in the Background menu and set them to change every few minutes or every day. On Mac, the Wallpaper settings include an option to change the picture at login or at a time interval you choose. This is useful if you like variety without having to manually change it yourself.

Frequently Asked Questions

Can I use a photo I took with my phone as a desktop background?

Yes. Transfer the photo to your computer using a USB cable, cloud storage like Google Drive or iCloud, or email. Once the file is on your computer, follow the same steps to browse for it and set it as your background.

What image size works best for a desktop background?

The best size matches your monitor's resolution — for example, 1920 by 1080 pixels for a common laptop screen. Larger images work fine and will be shrunk to fit. Smaller images may look blurry or pixelated if stretched to fill the screen. You can check your monitor's resolution in Display Settings on Windows or System Settings on Mac.

Will changing my desktop background slow down my computer?

No. The background image is stored on your hard drive and displayed by your graphics card. Changing it has no effect on how fast your computer runs or how much memory it uses.

Can I set different backgrounds on different monitors if I have more than one?

On Windows, yes — right-click each monitor's area in the Personalize menu and choose a different image for each one. On Mac, you can set different backgrounds for each space in Mission Control, but the same background usually appears on all connected displays unless you use third-party software.

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

Your background setting is usually preserved during an update. If it reverts to the default, you can set it again using the same process. Your original image file is not affected by the update.