From the Create section of the action bar, click Shellable Feature.
The Shellable Feature dialog box appears.
Click External Shape
in the dialog box.
The Body tab is displayed allowing you to
define an external shape.
Select the body from the tree to define the external shape.
Functional features that reference bodies are the
Basic Features
(using External Shape), push, pull, fitting
features, feature modifiers (remove and intersect features) defined
using External Shape and
Shellable Features using Selected core.
Click OK.
You can see the tree
display after creating an external shape feature
that references the body. The referenced body
is aggregated by the functional specification.