In accordance with some embodiments, a computer-implemented method performed at a portable multifunction device with a touch screen display includes displaying information on the touch screen display in a portrait orientation. The method also includes detecting simultaneous rotation of two thumbs in a first sense of rotation on the touch screen display, and in response to detecting the simultaneous rotation of the two thumbs in the first sense of rotation, displaying the information in a landscape orientation. In some embodiments, the method further includes detecting simultaneous rotation of the two thumbs in a second sense of rotation that is opposite the first sense of rotation, and in response to detecting the simultaneous rotation of the two thumbs in the second sense of rotation, displaying the information in a portrait orientation.