Press and hold down the Ctrl key. As you move the mouse cursor over different file references in the file, they display an underline. When you have the mouse cursor over the name of the file you want to open, click and the file will open in its own editor. In this example the managed bean NameBean will open.
This is the result of using OpenOn.
You can also try OpenOn with defined attributes.
You can also open any JSP pages.