Managing External References - AutoCAD 2011 and AutoCAD LT 2011: No Experience Required - page 693

4. In the File References area where xrefs are listed, the path appears for
each xref under the heading Saved Path (see Figure 13.35). The dot
backslash ( .\ ) preceding the filename indicates that the current file
path is relative and in the same folder as the current drawing. You can
slide the scroll bar to the right—or widen the palette—to see the full
path. Notice also that the Status column for this xref reads “Not Found.”
FiGuRE 13.35 The missing xref is identified in the External References
palette.
5. Click the 13C-SPLAY1 xref to highlight it. Move down to the Details
area, and click the blank space to the right of Found At.
A button with three dots appears at the right end of the blank space.
6. Click the button. This opens the Select New Path dialog box. Find the
13C-SPLAY1 drawing in the new Xref folder. Highlight it and click Open.
7. Back in the External References palette, the path has been updated to
reflect the current location for 13C-SPLAY1 . Move or minimize the
palette and then perform a Zoom Extents. You can see that the xref is
restored in your drawing.
WARNING When you're working with xrefs, be careful where
you store files that are acting as xrefs to other files. all the files' paths must
remain valid for the xrefs to be located.