Navigation:

by Mouse
Click left mouse button and move mouse to navigate. Distance and direction from center of view determines speed and direction of motion. Center area magnifies (+) and minifies (-) view. Right mouse button returns to the default view.

by Keys
Left and right arrow keys pan the view. Up and down arrow keys tilt the view. Plus (+) key magnifies and Minus (-) key minifies the view. Space bar returns to the default view.