Clusters are hard to see.

Set bgcolor=grey (or some other color) in the cluster.

GraphvizWiki: FaqClusterHardToSee (last edited 2008-01-16 20:27:24 by H-135-207-131-158)



How can I create edges between cluster boxes?

This only works in Graphviz version 1.7 and higher. To make edges between clusters, first set the graph attribute compound=true. Then, you can specify a cluster by name as a logical head or tail to an edge. This will cause the edge joining the two nodes to be clipped to the exterior of the box around the given cluster.

For example,

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