Bookmark where I was in a review document

When reviewing a document, I often have to leave the review and come back later.   MS Word has a new feature, when you open a document it opens to page one, but puts a little flag up saying ‘you were on this other page when you last opened this document – click here to snap to where you were’.    This would be a very handy feature in Collaborator.  Right now I have to write down what page I left off on – a bit of a low-tech solution.