1. One or more computer-readable media having computer-executable instructions for performing a method comprising: in a first pane for a node, presenting a representation of the node and one or more links from the node to other nodes adjacent to the node in a graph data structure; and responsive to activation of one of the links from the node to a selected node, presenting in a second pane adjacent to the first, a representation of the node for the activated link and one or more links from the node for the activated link to other nodes adjacent to the node for the activated link in the graph data structure.