To zoom-in, choose this icon, and click on any part of the Mars map. Each zoom-in click on the map magnifies the view about 2 times. The green-tinted stripes on the map are HRSC footprints of images, while the red-tinted boxes are SRC footprints.
To select images, choose this icon, and click on an image footprint. If one or more images cover the point you clicked, you'll see a thumbnail of the image below the map and its reference number in the Image List at left. Click either a thumbnail or the reference number, and a window will pop open giving image details.
Click on this help button to open a simple guide that explains how to use the web map more fully.