A computer implemented method for determining an intensity of user input to a computer system, performed by the computer system that is programmed to perform the method includes determining by a display, an indication of a finger position a user in response to a change in finger position relative to the computer system, wherein change in fin position is also associated with a magnitude of change, determining by a physical sensor of the computer system, the magnitude of change in response to the change in finger position, determining by the computer system, a user selection of a function to perform in response to the indication of the finger position, determining by the computer system, an input parameter associated with the function in response to the magnitude of change, and initiating performance by the computer system, of the function in response to the input parameter.