Sets a specific center of rotation in 3D Orbit view.
Starts 3D Orbit view and uses a center of rotation that you specify, either with your pointing device or by entering coordinates. If you specify a point outside the current view, the specified point is ignored and the default center of rotation is used instead.
3DORBITCTR overrides the Orbit Auto Target option, available from the shortcut menu when the 3DORBIT command is active.