1. A method comprising: at a computing device with a touchscreen display: presenting graphical information on the touchscreen display; detecting a finger touch at a location on the touchscreen display, the finger touch comprising a first contact area on the touch screen display, wherein the first contact area has a size; in response to detecting the finger touch, expanding a localized area of the graphical information on the touchscreen display to a first fixed size, wherein: the expanded localized area is proximate the location of the finger touch, the expanded localized area includes a plateau region that displays a magnified portion of the graphical information at a constant magnification level, and expanding the localized area of the graphical information on the touchscreen display to the first fixed size occurs at a speed based on the size of the first contact area; and, while continuing to detect the finger touch on the touchscreen display: detecting a movement of the finger touch over the touchscreen display; and, in response to detecting the movement, continuously changing a respective location of the expanded localized area to follow the movement of the finger touch.