To reposition the navigation bar and ViewCube
Docking Positions
check Link to ViewCube. When Link to ViewCube is checked, both the navigation bar and ViewCube are repositioned together around the current window. When ViewCube is not displayed, the navigation bar is docked in the same location in which ViewCube would be instead.
Docking Positions
and then a docking position. The navigation bar and ViewCube are repositioned.