Insert Uml Diagram Dialog Box. You can create UML elements without having to create any type of UML diagram in the New Gallery. Select the project in the navigator.

The UML elements that you create in the New Gallery are listed in the navigator and can be dropped onto your diagrams. On the Project menu click Add New Item. You can reverse it into a class diagram.
Do either of the following to open the Choose a SmartArt Graphic dialog box.
Functions Lists the user-defined functions you can add to the Diagram pane. In the dialog box select either Metric Units or US Units. Now you can click on the canvas again to add a second Box object. Double click on the package header field at the top left corner of the diagram with a labeled in it.