Though I did not personally watch him do it, I received from LFL a Word document of Revenge of the Sith with Mr Lucas' edits, which was distinct from the edits I'd already gotten from Sue Rostoni and Howard Roffman and the rest of the LFL crew, and this document was edited in such a detailed fashion that even individual words had been struck off and his preferred replacements inserted, as well as some passages wholly excised and some dialogue replaced with the dialogue from the screenplay. If that's not line-editing, I don't know what is.What's in that book is there because Mr. Lucas wanted it to be there. What's not in that book is not there because Mr. Lucas wanted it gone.
Period.
Author on line editing