Have you ever had so many xrefs in a drawing that the xref layers made it tough to navigate and find a specific layer in the Layer Properties Manager? I know I have. There is a way to "trick" the Layer Properties Manager to show you all the layers in your drawing minus the xref layers. Here's how:
1. Open the Layer Properties Manager.
3. In the Layer Filter Properties dialog box, enter a filter name. For example, NoXrefs.
In the Layer Properties Manager dialog box, the newly created filter will be set as the current view and only the current drawing layers will be displayed.
Another option is to first attach your xrefs then use the "invert filter" to only display layers that are not related to xrefs. To do this you simply launch the Layer Properties Manager and select the Xref filter and then toggle on the "invert filter" option.
The above method is great for versions prior to 2016. In AutoCAD 2016, after you add an xref to your drawing you will see that the software automatically creates an "All non-Xref Layers" filter.