Install on Windows:
Click on the image and resolution you want. When the image displays in the browser window, right-click on the image. From your browser's pop-up menu, select >Set as Wallpaper. Click >Set Desktop and close control panel.

Install on Macintosh:
Click on the image and resolution you want. When the image opens, click and drag to your desktop. Hold down the Control button on your keyboard while clicking on an empty area of your desktop. Choose >Change Desktop Background. Navigate to the photo that you have chosen and click on it.