Well moving the selection is the 3rd thing you can do, what you meant probably is moving the content of the selection. It's controlled by 3 buttons on top of th

Well moving the selection is the 3rd thing you can do, what you meant probably is moving the content of the selection. It's controlled by 3 buttons on top of the tools window, and this plus a few other things are worth spending a bit time to learn the basic concepts. Which is a good advice for PS as well, btw.