To Use a Section Box to Cross-Section a 3D Model for the First Time

To use a section box to cross-section a 3D model for the first time

1. Click Viewpoint tab Sectioning panel Enable Sectioning.

   Autodesk Navisworks opens the Sectioning Tools tab on the ribbon, and draws a section plane through the model in the Scene View.

2. Click Sectioning Tools tab Mode panel Box.

   The box is now visually present on the screen, with the move gizmo enabled by default.

3. Drag the gizmo to box-section your model along the axes.
   
4. Optional: Click Sectioning Tools tab Save panel Save Viewpoint to save the current sectioned viewpoint.