Windows users:
Click on the image you'd like to set as your wallpaper in the resolution that is appropriate for your screen. Allow the photo to fully load on this page. Right-click on the photo. Select "Set As Wallpaper" or "Set As Desktop Background" from the drop-down menu. Check desktop for new wallpaper. (You may need to restart your computer for wallpaper to be installed on your desktop.)

Mac users:
Click on the image you'd like to set as your wallpaper in the resolution that is appropriate for your screen. Allow image to fully load on this page. Move the cursor over the image. Hold down the mouse button over the image and drag the image to your desktop. Open "System Preferences" and select "Desktop." Drag the image into desktop pictures window. Select the image as your desktop. (You may need to restart your computer for wallpaper to be installed on your desktop.)

Windows users:
Click your right mouse button anywhere on your desktop that is not an active window. Select Properties from the drop-down list. You will see the Display Properties dialog box. Select the Settings tab. The slider in the Desktop Area will say 1280x 1024 or 1024x768 or 800x600. That will indicate to you which wallpaper resolution you should choose.

Mac users:
Exit all applications and choose "Control Panels/Monitors & Sound" from the Apple menu. The "Monitors & Sound" window will appear. Click the "Monitors" button. Color Depth and Resolution options will appear in the window. Your options will be 1280x 1024 or 1024x768 or 800x600. That will indicate to you which wallpaper resolution you should choose.