Civil 3d Xref Here

: Limits the visible portion of an XREF to a defined boundary.

Use Overlay if you don't want the reference to "nest" and show up when your current drawing is XREF'd into something else. Use Attachment only if it's a critical background that must travel with the file. civil 3d xref

The XREF is inserted at a Z elevation (0,0,100) while you work at (0,0,0). OSNAP ignores objects not on the same Z plane. : Limits the visible portion of an XREF

: Open your drawing and type XREF or XATTACH on the command line. You can also use the External References Manager found in the View tab on the ribbon. 100) while you work at (0