Form Composite Edges
To form virtual composite edges, on the Geometry toolbar, from the Virtual Operations menu (), select Form Composite Edges (). Then enter the properties of the operation using the following sections:
Input
Select the edges that you want to composite in the Graphics window. They then appear in the Edges to composite list. If the geometry sequence includes user-defined selections above the Form Composite Edges node, choose Manual to select edges, or choose one of the selection nodes from the list next to Edges to composite.
Click the Active button to toggle between turning ON and OFF the Edges to composite selections.
The operation forms a composite edge for each connected edge component (of manifold type) of the selected edges by ignoring the vertices between the edges. However, it does not ignore vertices when that would introduce closed or periodic composite edges.
Mesh Control
Use the Keep input for mesh control check box to specify that the selected edges are composed in the geometry but are available individually when you build the mesh.