The Edit Reference Model command enables you to change the reference model of the current drawing. The arrangement of the views and sections in the current drawing remains unchanged.
Using the command can be very useful in the following situations.
Drawing command, no model is associated with the new drawing. To associate a model with the new drawing, so that it becomes its reference model, use the Edit Reference Model command.The command button
is available in the Drawing category under the tab Commands of the Customize dialog box.