In the IDE

When you create your JSR 168 Java portlet, the related files display under the Portlets project of your application. One of the generated files, portlet.xml, which displays under WEB-INF, defines the characteristics and behavior of your JSR 168 portlet, for example, the different display modes that your portlet supports. The options you selected in the Create JSR 168 Java Portlet wizard are also saved to this file.