View > Camera Tools > Tumble Tool

Revolves the camera by varying the azimuth and elevation angles in a perspective view. You can also press + . Hold to constrain the camera movement.

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View > Camera Tools > Tumble Tool >

Tumble scale: Scales the speed of the camera movement. The slider range is 0.01 to 10. The default value is 1.
Tumble on object: Uses an object as the tumble pivot if the Tumble Tool icon is over the object when you start tumbling.

Tumble about

Controls the point that the camera tumbles around.

Center of Interest: The camera tumbles about its center of interest. Tumble about is set to Center of interest by default.
Tumble Pivot: The camera tumbles about its pivot point. This tumble pivot can also be set in the camera’s Attribute Editor.These values are stored in world space coordinates.

View operations such as Frame Selection, Frame All, Look at Selection, Default Home, and Bookmarks all set the tumble pivot.

Orthographic views

Locked: If on, you cannot tumble an orthographic camera. If off, you can tumble an orthographic camera. Locked is on by default.
Stepped: If on, you can tumble an orthographic camera in discrete steps. The Stepped operation lets you easily return to the Default Home positions. If off, you can tumble an orthographic camera smoothly. Stepped is only available if Locked is off. Stepped is on by default.
Ortho step: The angle of steps (in degrees) that you can tumble an orthographic camera when Locked is off and Stepped is on. The valid range is 0.01 to 180. The default value is 5.