Try SpringLayout, it should utilize space better for this kind of graph -



You could also color the links and move them to background to make it more legible.

Also try BorderedTreeLayout, it can create folder-tree kind of view with orthogonal links.

What do you mean by elbow arrow? If you want it to make a bend somewhere, insert a new point in link's ControlPoints collection and call link.updateFromPoints().

Try setting the Shape property of links to Cascading -

var layout = new MindFusion.Graphs.FractalLayout();
diagram.arrange(layout);
for (var l = 0; l < diagram.links.length; l++)
{
	var link = diagram.links[l];
	link.setSegmentCount(3);
	link.setShape(LinkShape.Cascading);
} 

Regards,
Slavcho

You could place each group of nodes in a ContainerNode, and call container.arrange(layout). Then call diagram.arrange(possibly_different_layout) to arrange the overall diagram. Finally remove the containers so it only keeps the arranged groups.

If you are looking for different layout classes, check if you like some from our desktop libraries better (e.g. .NET or Java) and we will port it to JavaScript for next release.

Regards,
Slavcho