Attaches selected DWG files as external references (xrefs).
Summary
When you attach a drawing file as an xref, you link that referenced drawing to the current drawing. Any changes to the referenced drawing are displayed in the current drawing when it is opened or reloaded.
The Select Reference File dialog box (a standard file selection dialog box) is displayed. After you select the DWG files, the Attach External Reference dialog box is displayed.
After the files are attached, you can adjust and clip the xref through the External Reference ribbon contextual tab.