Before I edit an article for publication, I read the whole article, so that I have all of it in my head at once. This may take some time as I seek to understand it completely. Then I edit, though not necessarily at once. Once in a while, an author will get in touch with me in the middle of the process and say, Here, take a look, I shuffled it around, or, See my changes to pages 3 and 5 -- or something of the sort. For me that may mean starting all over again, since I don't work in fragments. A few times, in such situations, I have said no, I’m not returning to this article.