If the current view is a 3D CAD view this command exports the 3D wire frame model to the CAD system
registered to open DXF files. This is equivalent to double clicking on a DXF file in Windows Explorer. The
program registered to open DXF files is automatically invoked and the data transferred via a temporary
DXF file, giving a seamless interface. If the current view is an unfolded pattern view then the 2D pattern
data is transferred to the CAD system. If it is a CAD or parametric design view then the 3D Wire or Face
data is transferred to the CAD System.