This portlet, like Ports, displays subcomponents of discovered resources. Unlike Ports, however, it is not driven by a Managed Resources portlet selection on the same page where it appears. Also, unlike Ports, it does not display snap panels in its expanded form, just more columns.
Right-clicking lets you use the following menu items: Details, Visualize, Domain Access Control, Actions, Event Management, Links and Show Performance. See Managed Resources for details about what those menu items do.