Many of the PlantUML diagrams have their layout handed off to GraphViz. Controlling layout can be tricky but can usually be achieved using a combination of placement directions and hidden/norank links. Understanding how the layout engine works (GraphVis) and the order of classes can help achieve desired layout. Link direction can have a significant impact on the layout. By following these tips, you can create visually pleasing diagrams with PlantUML GraphViz Layout.
