When you want to add the content of a previously used drawing as a reference to the host drawing, you have two possibilities: Bind vs. Insert. What is the difference between them?
Now you have two independent drawings. You can find almost similar named layers in them.
After you’ve attached the Sub DWG-t into the Main DWG, naturally the layers of Sub DWG will be displayed in Layer Properties Manager.
Then you can start to bind two drawings. Right-Click on the name of the drawing on the External References palette, and then choose the Bind… option.
In this case the following panel will be displayed, where you have to choose how to bind your drawing: Bind vs. Insert.
AutoCAD Xref type: BIND
Take a look at the first one. What happens if you choose Bind option in the Xref menu?
Bind converts the objects in the xref into a block reference. Named object definitions are added to the current drawing with a prefix of blockname $n$, where n is a number starting at 0. For example a layer named A-Door would change to Sub-Drawing$0$A-Door.
f you open the Linetype Manager, you will experience the same and even in case of Text Style.
AutoCAD Xref type: INSERT
Choosing Insert in the Xref panel will also convert the objects in the xref into a block reference. Named object definitions are merged into the current drawing without adding prefixes. Only those layers will be created which had not existed earlier in the host drawing. In this case the I-Furn named layer was that.
In this case that objects newly attached in the drawing will be displayed on the existing layers and a new layer will be created if it had not existed before in the host drawing. The same happens with Linetype and Text Styles also.
XREF enhancements in AudoCAD 2014
In AutoCAD 2014 you can find many enhancements concerning XREF, click on the link to see them.
You can click on the following links to see other AutoCAD 2014 enhancements: