With xrefs you can build drawings without significantly increasing the drawing file size.By using referenced drawings in Auto CAD Architecture, you can: A drawing file can be attached as an xref to multiple drawings at the same time.
If you are working in a project environment, the best practice for referencing project drawings into other project drawings is to use the Project Navigator rather than the standard Auto CAD Architecture Xref Manager.
The Auto CAD Architecture Xref Manager cannot differentiate between project drawings and non-project drawings.
Xrefs that have been created in drawing management can automatically make use of project data, while those that are created manually through the xref palette or command line cannot.
For example, a construct that is placed on a specific level will use that level's elevation data to control the Z-axis insertion point when being xrefed into a view.
The following options are displayed: Figure 1: External References palette Figure 2: Attach file types You can attach an entire drawing file to the current drawing as a referenced drawing (xref).