The GoVisual Diagram editor (GDE) provides powerful functionality for editing and automatic layout of diagrams. Diagrams are represented in form of graphs and cluster graphs. GDE contains all the layout styles available in the GoVisual libraries. he screenshot shows GDE's main window with several open document windows. The active document windows shows a cluster graph with several clusters highlighted by color. The cluster explorer at the right hand side displays the hierarchical nesting structure of clusters and nodes. It allows to move nodes and clusters within the cluster tree and thus provides an easy mean for managing the cluster structure of the graph.