Embodiments of a method for modifying a document, which may be performed by a system, are described. During operation, the system receives a selection of a subset of content in a first document. Note that the subset of the content may include one or more objects, and the selection may specify one or more positions of the one or more objects in the first document. Then, the system receives additional content associated with the selected subset. Next, the system generates a second document that includes the one or more positions associated with the subset of the content and the additional content.