What's New: 2021.2, 2023
Rotate a model about the center of the screen or about axes in model space. You can use Free Orbit and Constrained Orbit while other commands are active.
On the Navigation bar, click
Free Orbit
to activate the view navigation interface. Colors and zones in the image are used to illustrate the zone boundaries and are not part of the UI. The Orbit default shortcut key is F4.

Pause the cursor over one a zone and observe the cursor change to indicate the click-drag behavior, then click-drag to do the orbit.
Inside the circle orbit uses 3D spatial rotation. The pivot point is the circle center.
Click-drag the mouse left-right to rotate the view about the vertical screen axis.
Click-drag the mouse away or toward you to rotate the view about the horizontal screen axis.
Click-drag the mouse around the circle to orbit normal to the screen.
3-button mouse navigation features
. When you access Free Orbit using this method, the behavior is as follows, with the:
Rotation is about the model space center point. The SteeringWheels CENTER command or other methods described elsewhere set the center point.
Provides precise camera controls by accessing the 3D model environment while editing a drawing view.