The premier diagramming application for Mac OS X just got a whole lot better.
OmniGraffle Professional 5 includes a powerful toolset for advanced document creation and editing options. For the pro user who's looking for a full-featured diagramming and design tool, you've come to the right place.

Features :
- Subgraphs
Use subgraphs to expand and collapse segments of your diagram just like you can expand and collapse rows in outline view. Make a single diagram as simplified or as complex as you need.