Use the General tab of the Modify DWG/DXF Export Setup dialog to specify settings for export to DWG and DXF.
Select this option if you want rooms and areas to be exported to a DWG or DXF file as closed polylines.
For rooms, the exported polylines match the boundaries of rooms in Revit. The room boundaries are exported onto a single layer, and that layer is turned off by default in the DWG file. The polylines include the following XDATA information for room boundaries: Name, Number, Occupancy, Occupant, Department, and Comments.
For areas, the polylines include the following information for area boundaries: Name and Comments.
Select the Make layers containing the following text not plottable option to mark as non-plottable any layers whose names contain the specified text.
Note that the text box is inactive if the option is cleared.
These options define default values for the Export CAD Formats dialog when you use this export setup.
Export views on sheets and links as external references: Clear this check box if you want any Revit or DWG links in the project to be exported to a single file rather than to several files that reference each other.
Export to file format: Select the desired AutoCAD format from the drop-down list.