ERD of domain classes

Was wondering how I can get/see the ERD for domain classes like at:
http://www.jetbrains.net/confluence/display/GRVY/GORM

I am running the linux version of the IDE and have the jetgroovy plugin installed and working great for grails. However, I don't see the "tool bar" under the file name tab in the editor or the tabs at the bottom that allow for changing the "view". I am in Idea-7361 (7) and grails 0.5 (if I need to update the project to 0.6 I can).

Was wondering if there is another plugin it depends on I don't have.

Thanks
Doug