Using GIMP 2.6.11
My previous image-editing software of choice was Microsoft Paint, which was very intuitive: make a rectangle, click + drag to move the contents of the rectangle around.
How do I replicate this functionality in GIMP? I seem to only be able to a) move the entire layer around, ignoring the selection entirely, or b) move the selection around, without moving anything that's within the selection (which is what I'm trying to do).
I have the feeling that I'm missing something extremely basic.