Switch -s lets you choose from four different sizes for the PostScript graph. You may want to run this switch with various arguments to see what effects they have. All resulting graphs are landscape style. Consult the dot user's guide for further information. This will double the size of the graph and split it up between two pages.
Some graphs are long and narrow.
Other graphs leave some regions white no matter which of the previous arguments you choose. Comments, bug reports and suggestions for enhancements are welcome.