To open this dialog box, do one of the following:
The class, interface, or package is added to the Opened Files list and the Opened tab is automatically selected. If you specified a package, the package node appears in the Opened Files list; you can expand the list and select the file. The source file for the class or interface appears in the Source pane.
Click the Project tab or Opened tab to switch views. You can click the Doc tab to view the reference documentation for the class that is in the Source pane.