1) Select the screen size of the photo that fits your computer screen and click on it. This will display a full size picture of the one you selected.
2) When the photograph appears on the screen, right mouse click on the photo.
3) Select the "Set as Wallpaper" option.
4) On certain Windows machines, this will automatically transfer the photograph to wallpaper. On others, you will need to go into the Control Panel and use the Screen control to select the photograph as wallpaper.

Macintosh Users: (for system 8.0 or higher)

1) Select the screen size of the photo that fits your computer screen and click on it. This will display a full size picture of the one you selected.
2) Click on the picture in your browser and hold until a window pops up. Select "Save this Image as" and save the picture to your computer.
3) In the Control Panel of the Apple Menu window, there will be an option for desktop pictures (or appearance for OS 8.5 or higher). Choose this option. This will allow you to select the photo.