You can view and edit the file name and path that AutoCAD LT uses when loading a particular xref. Use this option if the xref drawing file has been moved to a different directory or renamed since it was first attached.
If the drawing you are working on contains an xref that has been moved to a different directory, AutoCAD LT displays a message at the site of the xref when you load the drawing. The message indicates that the xref cannot be loaded using the old path. When you specify the new path, AutoCAD LT reloads the xref into your drawing.
If the path of a nested xref is changed in the current drawing, the change is only saved if VISRETAIN is set to 1. If AutoCAD LT cannot save a changed nested xref path with the current drawing, the following message is displayed.
Warning: VISRETAIN must be On to save Nested xref path
When the drawing is reopened and the nested xref is loaded, AutoCAD LT attempts to find the xref in the original xref path first. If the xref is not found, AutoCAD LT searches the path saved in the current drawing and then searches the project path and Support File search path. This ensures that revisions made to the xref are reflected in the current drawing and also makes it possible for the xref to be found if its path has changed.
For example, the xref tree of the current drawing A is A>B>C, and the owner of drawing B changes the path of xref C to point to C1.dwg. When drawing A is reopened, it reflects the path change in drawing B and displays C1.dwg. However, if C1.dwg is not found, AutoCAD LT looks for xref C at the last location it was saved in drawing A.