Inserts an external
reference, image, or underlay (DWF, DWFx, PDF, or DGN files) in
the current drawing.
Ribbon: Insert tabReference
panelAttachNot available on the ribbon in
the current workspace
The Select Reference File dialog box (a standard file
selection dialog box) is displayed. To
select multiple DWG files for attach, set the Files of Type to Drawing.
You can select one file only for all other file formats.