I'm afraid that, if you've got a complicated schema, SQL Dependency Tracker isn't really going to be able to provide much of a compact view - there's a trade-off between clearly marking links between tables and fitting the diagram into a small space.
If you haven't already, you might want to play around with some of the layout options - the default is Balloon Tree, but sometimes the others can result in much more compact and intuitive dependency diagrams. That's about all I can recommend, sorry!
Andy Campbell Smith
Red Gate Technical Support Engineer