SMS:Switch Vertices and Nodes (Feature Objects Menu)
From XMS Wiki - http://wikis.aquaveo.com/xms/
In some cases, it is necessary to split an arc into two arcs. This can be accomplished using the Vertex <-> Node command. Before selecting this command, a vertex on the arc at the location where the arc is to be split should be selected. The selected vertex is converted to a node and the arc is split in two.
The Vertex <-> Node command can also be used to combine two adjacent arcs into a single arc. This is accomplished by converting the node joining the two arcs into a vertex. Two arcs can only be merged if no other arcs are connected to the node separating the arcs. Otherwise, the node must be preserved to define the junction between the branching arcs.
