Become Primary Part
Select Become Primary Part to specify the primary part for your composite part. The primary part is the subpart with which most interaction will take place. It is the part whose interface is transparently exposed through the interface of the composite part.
By default, the primary part of a composite part is the part that was added to the free-form surface first. For a visual composite part, this is always the Window part that VA Smalltalk provides by default.
If the pop-up menu for a part does not include Become Primary Part, then the part is already the primary part.
Last modified date: 01/29/2015