Right-click Body.1 and select Define
In Work Object.
The extraction properties feature being created will belong
to the Functional Body of the In Work Object, in this case
Solid Functional Set.1.

Click Extraction Properties
.
The
Extraction Properties dialog box appears. The features
that have protected volumes are listed.

Select Protected Prism.3, then click the left arrow
to move it into the Core column.
Click OK to create the extraction properties
feature.
Extraction Properties.1 has been inserted in the specification
tree.
