An interface method in a digital television receiver, comprising: selecting an RF broadcast signal respective to a channel selected at a tuner; converting the selected RF broadcast signal to a baseband video signal; receiving data packets from a network by a network interface; displaying a main display area and multiple other display areas on a touch screen display, wherein the main display area is centrally positioned on the touch screen display, and wherein a first other display area located at a left side of the main display area displays the converted baseband video signal corresponding to the selected channel, and a second other display area located at a right side of the main display area displays multiple chat windows, wherein the multiple other display areas are displayed on opposite sides of the main display area; characterized in that it further comprises: detecting an object-down event at a first position within the main display area; detecting an object-up event at a second position within a sub display area, wherein the sub display area corresponds to one area among the multiple other display areas; calculating a difference value between the detection time of the object-down event and the detection time of the object-up event; verifying whether or not the calculated difference value is smaller than or equal to a time value predetermined in advance; and moving the main display area to the sub display area while moving the sub display area to the main display area if the calculated difference value is smaller than or equal to the time predetermined in advance. selecting an RF broadcast signal respective to a channel selected at a tuner; converting the selected RF broadcast signal to a baseband video signal; receiving data packets from a network by a network interface; displaying a main display area and multiple other display areas on a touch screen display, wherein the main display area is centrally positioned on the touch screen display, and wherein a first other display area located at a left side of the main display area displays the converted baseband video signal corresponding to the selected channel, and a second other display area located at a right side of the main display area displays multiple chat windows, wherein the multiple other display areas are displayed on opposite sides of the main display area; characterized in that it further comprises: detecting an object-down event at a first position within the main display area; detecting an object-up event at a second position within a sub display area, wherein the sub display area corresponds to one area among the multiple other display areas; calculating a difference value between the detection time of the object-down event and the detection time of the object-up event; verifying whether or not the calculated difference value is smaller than or equal to a time value predetermined in advance; and moving the main display area to the sub display area while moving the sub display area to the main display area if the calculated difference value is smaller than or equal to the time predetermined in advance. detecting an object-down event at a first position within the main display area; detecting an object-up event at a second position within a sub display area, wherein the sub display area corresponds to one area among the multiple other display areas; calculating a difference value between the detection time of the object-down event and the detection time of the object-up event; verifying whether or not the calculated difference value is smaller than or equal to a time value predetermined in advance; and moving the main display area to the sub display area while moving the sub display area to the main display area if the calculated difference value is smaller than or equal to the time predetermined in advance.