Click on the link for your desired wallpaper size. This will open the wallpaper in a new window. Then:
- Internet Explorer: (PC/Mac) Right Click on the image and select "Set as Background."
- Firefox: (PC/Mac) Right click on the image and select "Set As Desktop Background."
- Safari: (Mac) Control click on the image and select "Save Image to the Desktop." Add the image to your desktop using the Desktop & Screensaver System Preferences.