You can refine an existing project in the Designer. You
might want to refine a prototype or change the styling.
You can reuse projects in the Designer only if they have
been developed exclusively with the Designer. Projects that have been
further developed in the SDK are likely to contain features that are
not available in the Designer.
You can drag a project file from a directory into a Designer
window. The diagram configured by the project file opens automatically
in the Designer. The drag-and-drop action is available in both Style
Editing and Diagram Editing modes.