Click Output tab Export to DWF/PDF panel 3D DWF. Find
In the Export Data dialog box, specify the name and location of the DWFx file.
Select 3D DWFx (*.dwfx) from the Files Of Type list. Click Save.
By default, all model space objects are exported to the 3D DWFx file, and if your drawing contains xrefs, the Group By Xref Hierarchy option is active.
(Optional) Click Yes to open the Autodesk Design Review and view the published 3D DWFx file.