I have a large Assembly that contains quite a few smaller sub assemblies, as of right now each sub assembly has its own drawing file containing all the parts in that sub assembly. What i am trying to do (or see if its even possible) is to create one major drawing file that contains all the sub assembly drawings. i am aware that you can start a new drawing and drag and drop, or copy and paste all the other sheets  into it, but is there a way to keep that sheet that you have now dropped into the new drawing linked with the old one, (ex. add a note to the page in the major drawing file, and it will be in the other as well? or something along those lines)