Click Sectioning Tools tab > Mode panel > Planes .
Click the Current Plane drop-down on the Planes Settings panel, and select the plane you want to customize, for example, Plane 1.
This plane becomes the current plane.
Click the Alignment drop-down on the Planes Settings panel, and select one of the six pre-fixed directions, for example, Top
Navisworks updates the position and alignment of the section plane.
To save the current sectioned viewpoint, click Sectioning Tools tab > Save panel > Save Viewpoint .