A clip plane enables you to define a plane that hides all objects displayed in the viewer that lie to one side of the plane. For example, you could use an XY plane and clip it at Z=1 so that objects are visible only where Z is less than or equal to 1 (or greater than or equal to 1 if the Flip Normal check box is selected).
A clip plane will act on all objects in the viewer, including
the Wireframe, but will not affect other functions
such as calculations (that is, a calculation will still use the entire
location, whether visible or not).
Note: There are several ways to insert a clip plane:
From the menu bar, select Insert > Clip Plane.
From the toolbar, click the Clip Plane
icon.Depending on the context, you may be able to perform an insert from the shortcut menu in the tree view.