1. A computer storage medium encoded with a computer program, the program comprising instructions that when executed by data processing apparatus cause the data processing apparatus to perform operations, the operations comprising: identifying a swiping action between a touch sensor and a touchscreen that are both coupled to a computing device, the identification of the swiping action including: determining, while the computing device is in a state that provides a first graphical display on the touchscreen, that the touch sensor has been physically contacted by a user; determining that the physical contact with the touch sensor has ended; determining, within a predetermined time period of the end of the physical contact, that a dragging motion across the touchscreen has originated at a peripheral edge of the touchscreen; and in response to identifying the swiping action, invoking a predetermined computerized routine that replaces the first graphical display with a second graphical display, wherein user interaction with the touch sensor or touchscreen individually do not invoke the predetermined computerized routine.