In AutoCad LT 2007, I was able to change the name of an xref so that reference to those layers in the xref could be more easily identified. For example, an xreferenced exisitng floor plans name could be changed to XXPLAN even though the path would still be to the file with job number, name, drawing number, etc. With the changed name, those layers would always be short, descriptive, at the end of the list, and out of the way with the other xreferences: XELEV, XDETAILS, etc. So is it possible to change the reference name in LT 2013 for Mac?
In AC LT for Mac you have to change the name of the external reference block (as changing the name of Xref in Xrefs palette doesn't work - not sure is it a bug or feature ).
Call RENAME command, rename Xref block - select Block category from the left, double-click Xref block name on the right side of dialog, enter new name (add "X" at the beginning, for example). Close RENAME dialog.
You won't see changes in Layers names at this time in Layers palette, but if you close drawing and open it again - you will see the changes in Layers palette.