Form Composite Faces
To form virtual composite faces, on the Geometry toolbar, from the Virtual Operations menu (), select Form Composite Faces (). Then enter the properties of the operation using the following sections:
Input
Select the faces that you want to composite in the Graphics window. They then appear in the Faces to composite list. If the geometry sequence includes user-defined selections above the Form Composite Faces node, choose Manual to select faces, or choose one of the selection nodes from the list next to Faces to composite.
Click the Active button to toggle between turning ON and OFF the Faces to composite selections.
Use the Ignore adjacent vertices check box to specify if the operation also removes the ignorable vertices on the boundary of each resulting composite face.
The operation forms a composite face for each connected face component (of manifold type) of the selected faces by ignoring the edges between the faces.
Mesh Control
Use the Keep input for mesh control check box to specify that the selected faces are composed in the geometry but are available individually when you build the mesh.