There are several options for deleting meshes and mesh components and composite regions using shortcut menu items available in the Outline tree view in CFX-Pre. These options are:
Delete All Mesh: Available when you right-click Mesh. When selected this option deletes all meshes currently present.
Delete Mesh: Available when you right-click individual meshes themselves or Composite 3D Regions or Primitive 3D Regions that map directly and entirely to one or more assemblies. When selected, this option deletes all mesh associated with the selected assemblies.
Delete Definition: Available when you right-click a composite region. When selected this option deletes the definition of the composite region name but not the underlying mesh.