Ok, I have a bit of an urgent need here, first here is the situation:
We have a file on which all of our work is drawn and the file is xrefed into our sheets.
Currently all of the xrefs that are needed are attached into this drawing; however, for a variety of reasons these need be Overlays and all of the xrefs need to be overlaid into each sheet.
The only problem is that all of the layers turn back on once this is done and there are thousands of layers, even saving a layer state before changing everything to overlay and restoring it when it is done does not work.
I am wondering if anyone might have some LISP routines that might help with this?