Here’s how:
Windows (IE):
Right-click on the image to the left that fits your
monitor, then choose “Set as Background.”
Mac OS X
users:
Click on the image to the left that fits your
monitor and drag it 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.
