http://msmvps.com/blogs/matthieu/archive/2009/04/12/edm-designer-one-more-new-feature.aspxI just added a new feature in my EDM Designer : when an entity type isn't mapped or is only partially mapped (so we aren't able to use our edmx), I reduce its opacity: I do the same for Model Browser: I also do the same for associations:enCommunityServer 2008.5 SP2 (Build: 40407.4157)