It seems I've inadvertently changed my screen size and it's really messed up my screen shots, whenever I paste them into paint and save them it shows a large white section at the bottom of the photo, if I move the bottom frame down before saving the screen shot it skews the image and ruins it, the size of the first screen shot is 1366 x 770 it seems to be stuck at this size, the second screen shot after moving the bottom frame down is 1366 x 1080. how do I change this back to the original setting and make it stick ?