Do you know XOPEN?
Many of you may be aware that you can now highlight or select your external references within the Xref Manager dialog box and click the "Open" button to open it in a new document window. Right?
But an even easier and more direct method is the one that helps when you don't even know what the Xref's name is! Ready? Type "XOPEN" at the command line and simply select a part of the xref from the screen. Magically, AutoCAD will find the file that you selected and open it in a new document window.
An alternative method is to select your External reference on the screen, right click, and choose "Open Xref" from the context menu.
Now how easy is that?