Click the 'Desktop' link below the image of your choice. In the next window, right-click the image and choose 'Set as Background' from the menu. If the image stretches, please check your computer display settings.
Mac OS 10 Desktop
Click the 'Desktop' link below the image of your choice. In the next window, click and drag the image to your Pictures folder. Hold down the Control button on your keyboard while clicking on an empty area of your computer desktop. Choose 'Change Desktop Background...' from the menu. Navigate to the image that you have chosen and click on it. Choose a display option from the drop down menu.
iPad and iPhone
Click the link for your device below the image of your choice. In the next window, touch and hold the image and choose 'Save Image' from the menu. Go to Settings, Brightness and Wallpaper, click the Wallpaper, select Camera Roll, choose an image, move and scale if desired, then choose whether to set as Lock Screen, Home Screen or Both.