To rotate the material handling arm, click your left mouse button and drag your mouse. To zoom in, click your right mouse button and drag your mouse. To move the arm, click with both buttons and drag.
To rotate the arm, click and drag with your mouse. To zoom in, press the function key and click your mouse at the same time. For other options, press the control key and click your mouse.
To extend the arm, press 1. To reset the model to it's original position, press r..