To form virtual composite domains, in the Geometry toolbar, from the Virtual Operations menu (), select Form Composite Domains ( or ). Then enter the properties of the operation using the following sections:

Select the domains that you want to composite in the Graphics window. They then appear in the Domains to composite list. If the geometry sequence includes user-defined selections above the Form Composite Domains node, choose Manual to select domains, or choose one of the selection nodes from the list next to Domains to composite.

Click the Active button to toggle between turning ON and OFF the Domains to composite selections.

Use the Ignore adjacent vertices (2D) or Ignore adjacent edges and vertices (3D) check box to specify if the operation also removes the ignorable vertices (and edges in 3D) on the boundary of each resulting composite domain.

Use the Keep input for mesh control check box to specify that the selected domains are composed in the geometry but are available individually when you build the mesh. This gives you more control of the meshing. A well partitioned geometry is more efficient to mesh and can, for example, make it possible to create a high quality hexahedral mesh through the sweep operations.