Rotate the plot with your left mouse button. Releasing starts spinning. SHIFT key plus vertical dragging gives zooming. SHIFT key plus horizontal dragging gives rotation about perpendicular axis. CONTROL key plus vertical dragging changes focal length. CONTROL key plus horizontal dragging changesh of stereo effect. ALT key plus right mouse button plus vertical dragging strips part of the plot. "s" key toggles between single and stereo picture. Hit 'Home' to reset the plot. Your web browser must be Java activated. The image rendering is CPU intensive. Faster CPU = smoother rendering.