I have an overview diagram of all the classes in all packages. I do not display any of the relationships between the classes or packages because the diagram gets too busy. Although some of the packages are displayed in a grid-like pattern (appears to be the packages with more than 5 classes or so), other packages (seem to be ones with only a few classes) are laid out in width, making the diagram a very large width with lots of whitespace.
I realize that GraphViz is to blame here. Any tips or tricks for improving the layout? I can't use the "vertical" relationship trick since there are no relationships being shown.