Clip the Model
To clip the 3D model:
On the Visibility smart panel 
, make sure the reslices are shown.
In the 3D viewer, right-click one of the reslices and select the part to be clipped (upper, lower, left, right, anterior or posterior part).
The 3D volume in the 3D viewer is clipped on the position of the corresponding reslice.
Notes
Changing the position of the reslice updates the clipping position.
The airway and minimal cross-sectional area objects are not clipped.