A method of controlling a home appliance having a touch panel and a touch panel home appliance using the same, such as a remote controller for controlling a television receiver, facilitate user recognition and selection of a specific function key displayed on a touchscreen, to enable enhanced control of the function key by a user desiring to step through many values of a range of values quickly and accurately. The method includes steps of displaying a main menu on the touchscreen of the touch panel, the main menu including at least one function key for controlling the home appliance, the touchscreen enabling a function key of the main menu to be selected by a user; displaying, in response to a user selection of one of the at least one function key, a set of enlarged keys corresponding to the selected function key of the main menu, the display of the enlarged keys on the touchscreen wholly replacing the display of the main menu; and executing, in response to a touch event with respect to the touchscreen displaying the set of enlarged keys, a control function corresponding to the selected function key, the control function having a parameter value set according to properties of the touch event.