A method for controlling a control region on a display screen of a computerized system is presented. The method includes obtaining data from a touchpad. The data is associated with a position of a portion of the hand of a user when the user operates the touchpad. The method includes transmitting the data from the touchpad to the computerized device and analyzing the data in accordance with a model of a human hand. In certain embodiments, the method includes detecting an interaction of at least the portion of the hand of the user on the first touchpad with at least one object displayed on the display screen causing at least one property of the object to be controlled in accordance with the interaction of the portion of the hand of the user on the first touchpad.