UML in IntelliJ 10.5

Hi,

Looking at the online documentation it seems to imply that there are some UML capabilities built right into IntelliJ, including the ability to reverse engineer existing source into an classdiagram.  http://www.jetbrains.com/idea/webhelp/uml.html

But I don't see any UI by default that lets me do this.  It is possible I'm just looking in the wrong place.  Can somebody point me in the right direction?  How do I get to a view of a class diagram for my code?  Is it automatically available in the Ultimate edition or do I need to download a plug-in to get this to work?

Thanks,
scott