Hello, brand new user here . . . the page link you provided explains how to make a NEW rectangle, but it does not explain how to SELECT the rectangle made previously. The Rectangle Selection Tool only makes new rectangles. I'm looking at the linked page and see that is in a section called Documentation, where / how do you get to that? It does not appear to be accessible from the paint.net? And the Basic Tutorials date from 2008, old stuff in there.