“If a picture is worth a thousand words, a diagram is worth a thousand pictures. Whether you’re presenting a sales strategy to your boss or explaining your newest invention to a friend, diagrams let you express relationships and concepts better than you can with words and images alone. OmniGraffle Professional 4.0, the latest revision of The Omni Group’s diagramming application, adds new features that will entice current users to upgrade and encourage everyone else to take a closer look.”