1. Click on the link for the resolution you would like to use.
2. When the image has completely loaded, right-click on the image
3. Choose the 'Set As Wallpaper' option
MacOS 8.x: Download by clicking on one of the resolution numbers below the picture. After downloading, place the image somewhere on your hard drive. From the "APPLE" menu, select "CONTROL PANELS/APPEARANCE." When the "APPEARANCE" window opens, select "DESKTOP" tab. Click the "PLACE PICUTRE" button. (If you already have a picture as a background, you will need to click the "REMOVE PICTURE" button first.) Navigate to where you stored your downloaded images. After selecting it, click "SET DESKTOP."
Windows: Download by clicking on one of the resolution numbers below the picture. Once the larger image has loaded, RIGHT CLICK on the image and look for the "SET AS WALLPAPER" command. Place the image in your Windows directory. RIGHT CLICK on your desktop and select "PROPERTIES". Under "PROPERTIES" click on the "BACKGROUND" tab and select the image you wish to use as your wallpaper. Under the "DISPLAY" pull-down box select "STRETCH" for the image to fit your screen.