Is it possible to merge these layers together??
How do I merge layers in an XREF
You won't be able to while they're still Xref-dependent, with the "pipe" character separating the drawing name and the Layer name. You would need to Bind the Xref first. XR for the CLASSICXREF command, select the Xref in the dialog box and the Bind... button on the right. If you're going to merge the Layers, it doesn't matter whether you choose the "Bind" or "Insert" option.
Then go into the Layer Manager, select all the appropriate Layers, right-click, and:
IF you want the Xref to remain one, so that changes in the source drawing will be reflected in the current one, then I would suggest you assign the same color and whatever properties to all the Xref-dependent Layers. Then they will all look the same, as if merged, except for any individual objects with property overrides. To retain those properties in those Layers, rather than have them revert to the properties in the source drawing next time you open the drawing, set the VISRETAIN System Variable to keep them.
Kent Cooper, AIA 