29. The computer-readable storage medium of claim 1 , wherein the method further comprises adding to the electronic document file instance data uniquely associated with one of the copies.
29. The computer-readable storage medium of claim 1 , wherein the method further comprises adding to the electronic document file instance data uniquely associated with one of the copies. 30. The computer-readable storage medium of claim 29 , wherein the instance data comprises a layout element that defines a visual property of the one copy.