This graphic gives an overview of adding portlets and navigation controls. Four steps point to a box called "WAR file." The four steps are: 1) Define a portlet, 2) (Optional) Define UI controls to contain your portlets, 3) Create a NetUI Extension XML file to define a location for your UI controls or portlets, and 4) (Optional) Add UI controls to the NavTreePortlet. The WAR file box points to the final step, "Deploy Extension.