Before using a DWG file that contains xrefs, consider whether you should import it or link it to a Revit project.
Suppose you use AutoCAD to generate a DWG file that contains external references (xrefs). When you import or link the DWG file, Revit displays the geometry from the nested xrefs. The decision to import or link a file to a Revit project affects what you can do with the xref information: