Allows the contents of the 3D View to be rotated about a point. The default center of rotation is the global origin, but the rotation point can be changed to the center of any surface's trimming volume by holding the Ctrl + left mouse clicking on the surface of interest in the 3D View. Upon selection the surface will momentarily change colors. To change back to the global origin, Ctrl + left mouse click on the background in the 3D View. Upon selection the 3D View background will momentarily change colors.
There are three different ways to execute this command: •Menu > 3D View > Trackball Mode •F5 •Toolbar button:
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