Earth Vistas Screen Saver displays color photos of of the earth as seen from the space shuttle as your screen saver or wallpaper. It includes 10 images. You will see mountains, seas, cities, glaciers, and more from the perspective of space.You can enlarge the images to fit your screen, or display them in their original size. For an artistic look you can optionally display the images in black and white.The screen saver displays the images as a slide show. You can configure it to change the images after a specified time interval (in minutes or seconds), use any of the 14 transition effects, and display the images in sequential or random order.You can choose to cycle the wallpaper every hour, day, or week, or never.