Select one or more objects that you want
to view with 3DORBIT or select no objects if you want to view the
entire drawing.
NoteOLE objects and raster
objects do not appear in the 3D Orbit view.
Click View
tab Navigate
panel Orbit. At the Command prompt, enter 3dorbit.
Use one of the following
methods to orbit around the objects:
To rotate along the XY plane, click
in the drawing and drag the cursor left or right.
To rotate along the Z axis, click
in the drawing and drag the cursor up or down.
To allow unconstrained orbiting along
the XY plane and the Z axis,
press Shift while you drag the cursor. An arcball is displayed and
you can use the 3D Free Orbit (3DFORBIT) interaction.
Navigate
panel 
At the Command prompt, enter 3dorbit.
Toolbar: 3D
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