Autodesk AUTOCAD 2006, Command Reference Manual, Page: 59 / 1490

When you move the cursor over one of the small circles on the top or
bottom of the arcball, it becomes a vertical ellipse. Clicking and dragging
from either of these points rotates the view around the horizontal or X axis
through the middle of the arcball.
3DOrbit Shortcut Menu
When the 3DORBIT command is active, you can change the view using one
or more of the options on the 3D Orbit shortcut menu. To access the 3D Orbit
shortcut menu, right-click in the 3D Orbit view.
Pan
Moves objects in the view horizontally and vertically. See 3DPAN.
Zoom
Simulates the effect of a camera’s zoom lens. See 3DZOOM.
Orbit
Returns the view to Orbit mode after use of the other menu commands, such
as Zoom, Pan, or Continuous Orbit.
More
Accesses one of the following view options:
Adjust Clipping Planes
Opens the Adjust Clipping Planes window. See 3DCLIP.
Adjust Distance
Simulates the effect of moving the camera closer to the object or farther
away. See 3DDISTANCE.
Back Clipping On
Turns the back clipping plane on or off. A check mark in front of this option
indicates that the back clipping plane is on and you can see the results of
moving the line that adjusts the back clipping plane. See 3DCLIP.
3DOrbit Shortcut Menu | 35