Export of DXF file is specific type of export, enabling you to export cutting layout drawings. There are two ways how to export cutting layouts to dxf files. The first one is to export it manually from program menu (File > Export > Export cutting layouts to DXF files). The second one is to set auto export path. See more in chapter Setting the Options > DXF Export.
Following picture represents cutting layout exported as dxf file opened in CAD application.
It is possible to export objects like Stocks, Parts, Part info, Layout info and Cuts. Each object can be exported as separate layer.