Place Mouse in image
Depress mouse key and scroll around the window to get a full 360 degree view of the drilling site.
The magnifying glass with the plus (+) sign (in the lower left corner) zooms in on the image. In some browsers, you can use the SHIFT key.
The magnifying glass with the minus (- ) sign in the lower left zooms back out on the image. In some systems, you can press the CONTROL key.
Thanks to C. Kuno Lechner