Hmm. Shutter button is located on top of keyboard/body and my thumb is supporting body from bottom so pressure from up goes basically directly to my thumb. I don't touch screen portion from up or down. You have to have really fat thumb tip if you are having that kind of problem. I have to test that with my friends with "giants" hands, but I doubt that he's going to have any problems. And after all whenever you are using ANY photographing device you should always give it, or at least try, maximum support by using both hands. One hand is always easily shaken. But I´m sorry to hear that taking pictures is that troublesome to you. .edit I have correct myself that of course i touch screen portion, but there is no pressure on that point.