Follow these steps to export geometry created in Design:
Select the geometry in the object list under DESIGN that you want to export.
Click on the Export icon next to the object to initiate the export.
The Export Design dialog will appear, allowing you to choose whether the file should be saved directly to your computer or in a folder in the project's file manager.
Select the file format via dropdown list, DXF, LandXML or KML.
Choose Download to export the file in the browser and save it to the default save-as location.
Choose Export to File Manager... to export the file to a folder in the project's file manager.
Attributes associated with your design do not accompany the export to LandXML.