Click the Section
ON/OFF button 
in the View
creation dialog.
Click Assembly Tree and check/uncheck the components which are to be sectioned in the view.
The Section ON/OFF option allows you to select which objects in a set will be sectioned in a section view. In the following example, the components of a screw have been unselected and therefore will not appear as sectioned in the view.
Create a view then proceed as follows:
Click the Section
ON/OFF button in the View
creation dialog.
Click Assembly Tree and check/uncheck the components which are to be sectioned in the view.
OR
Click on the geometry in the view then from the popup menu, double-click the sub-assembly or part to be hidden. The Assembly Tree is updated accordingly (unchecked).
If required, check the Show hidden entities option to display entities hidden in sets in the part document.
Click OK. and exit. The unchecked objects are not sectioned in the view:
Note: The Section ON/OFF default settings are defined either in the Catalog or Cimatron E Explorer.