Patent ID: 7385592

Claim:
A handheld data processing device having a screen to enable a user of the device to enter an input, wherein the screen is touch-sensitive, the device comprising: interface means for generating a graphic user interface (GUI) on the screen, the GUI having a plurality of image elements representing a plurality of inputs, and the screen being operable to generate one of a plurality of control signals corresponding to one of the plurality of inputs in response to a portion of the screen on which the one of the plurality of image elements is displayed being touched by the user; and processing means responsive to generation of the each one of the plurality of control signals to process the corresponding input; characterised in that the interface means is operable to: receive an input on the screen from a user's digit of a hand in which the device is held; determine a mean distance on the screen reachable by the user's said digit; define an accessible portion of the screen as being an area on the screen within the mean distance; locate the plurality of image elements on the accessible portion of the screen, so that the plurality of image elements are within reach of the user's said digit; and scale the plurality of image elements so as to not exceed the accessible portion of the screen.