reference will now be made in detail to the preferred embodiments of the present invention , examples of which are illustrated in the accompanying drawings . fig1 is a front view of a mobile communication terminal 10 according to an embodiment of the present invention . as illustrated in fig1 , the mobile terminal 10 includes a display unit 120 having a touch screen 122 ( that is , a touch device ). further , a main menu and corresponding sub - menus are displayed on the touch screen 122 such that a user can select a desired function on the mobile terminal 10 . fig2 is a block diagram illustrating the mobile communication terminal 10 according to an embodiment of the present invention . as illustrated in fig2 , the mobile communication terminal 10 includes a transmit / receive unit 100 , a memory unit 110 , the display unit 120 , an input unit 130 and a controller 140 . the transmit / receive unit 100 receives data from a base station via an antenna ant , and transmits data generated by the mobile communication terminal 10 to the base station via the antenna ant . in addition , the memory unit 110 may include a flash memory , a read access memory ( ram ), an electrically erasable programmable read only memory ( eeprom ) or the like , and stores a program for controlling an overall operation of the mobile communication terminal 10 . the memory unit 110 also stores a plurality of main menus and one or more sub - menus corresponding to the main menus . further , the display unit 120 displays contents received from the transmit / receive unit 100 , a variety of information signals , the contents of data stored in the memory unit 110 , etc . in addition , as discussed above , the display unit 120 includes the touch screen 122 that the user can touch to select any one of a plurality of main menus and sub - menus . further , the touch screen 122 is a screen in which an instruction is executed or the location of a cursor is moved by recognizing a portion at which the user touches the touch screen 122 ( e . g ., using his or her finger , a pointer , a touch pen , etc .). for example , the touch screen 112 may be a screen in which a screen surface is filled with the flow of charge current , and have sensors installed around the screen surface . then , the touching of the screen is detected using an electrostatic method of perceiving a place at which the user touches the touch screen 122 by sensing the degree of charges lost at the time the user touches the touch screen 122 . the touch screen 122 may also be any other type of touch screen , such as a pressure - sensitive touch screen is which the screen responds to pressures applied to the screen surface , an infrared type touch screen in which a contact location is detected by sensing that infrared rays are precluded where the touch occurs , etc . further , the input unit 130 includes number keys , a variety of function keys , arrow keys , etc . and outputs a signal to the controller 140 corresponding to a key selected by a user . in addition , the controller 140 includes a mobile station modem ( msm ) and controls the general input and output operations of the mobile terminal 10 . for example , if the controller 140 detects that the user has dragged his or her finger ( or other pointing object ) in a direction from a main menu towards a specific sub - menu displayed on the touch screen 122 , the controller 140 executes the operation corresponding to the specific sub - menu . these features will now be described in more detail . in more detail , fig3 is a flowchart illustrating a method of selecting a menu according to an embodiment of the present invention . fig2 will also be referred to in this description . as shown in fig3 , the controller 140 stores a plurality of main menus , and one or more sub - menus corresponding to the main menus in the memory unit 110 ( step s 300 ). further , the main menus and the sub - menus have a hierarchical structure formed by collecting correlated functions . that is , the main menu refers to a menu covering the correlated function of one or more sub - menus . for example , fig4 ( a ) illustrates main menus including a receive message box , a multimedia message , ring tones , a call list , an electronic note , and an environment setting . other main menus may also be displayed , and fig4 ( a ) is only a partial list of all main menus that may be included with a mobile terminal . next , in fig3 , the user can select any one of the displayed main menus by touching a corresponding main menu ( step s 310 ). for example , fig4 ( b ) illustrates a state in which the user touches the main menu “ ring tone ” in fig4 ( a ). as shown in fig4 ( b ), when the user selects the main menu “ ring tone ”, the controller 140 displays a plurality of corresponding sub - menus around the main menu ( step s 320 in fig3 ) . that is , the controller 140 displays the sub - menus “ lamp ”, “ vibration ”, “ bell ” and “ vibration + lamp ” corresponding to the main menu “ ring tone ” around the main menu “ ring tone ” as illustrated in fig4 ( b ). in this embodiment , the main menu “ ring tone ” is located at the center , and the sub - menus “ lamp ”, “ vibration ”, “ bell ”, and “ vibration + lamp ” are located so as to surround the main menu “ ring tone ”. then , as shown in fig4 ( c ), the user drags his or her finger from the main menu “ ring tone ” in a right direction to the sub - menu “ vibration ”. thus , the controller 140 senses the user has dragged his or her finger ( or other pointing device ) in this direction ( step s 330 in fig3 ) , and executes the operation corresponding to the sub - menu “ vibration ” ( step s 340 ). that is , the controller 140 sets the ring tone for the mobile terminal 10 to be a vibration ring tone ( where the terminal 10 simply vibrates to inform the user about an incoming call , text or voice message , etc ). the controller 140 also displays a completion message “ vibration setting has been completed ” to the user as shown in fig4 ( d ). the controller 140 may also just vibrate the terminal 10 to inform the user that the vibration setting has been completed , rather than displaying the completion message . fig5 illustrates the main menu “ ring tone ” and corresponding sub - menus , and the directions in which the user may drag his or her finger to select and execute a corresponding sub - menu . in other words , to select the sub - menu “ vibration ”, the user first touches the main menu “ ring tone ” and then drags their finger in the right direction to the “ vibration ” sub - menu . similarly , to select the sub - menu “ lamp ”, the user first touches the main menu “ ring tone ” and then drags their finger in an upward direction to the “ lamp ” sub - menu . further , to select the sub - menu “ bell ”, the user first touches the main menu “ ring tone ” and then drags their finger in the left direction to the “ bell ” sub - menu . also , to select the menu “ vibration + lamp ”, the user first touches main menu “ ring tone ” and then drags their finger in a downward direction to the “ bell ” sub - menu . in addition , fig5 illustrates the user dragging his or her finger all the way through the corresponding sub - menu . however , it is also possible for the controller 140 to activate a corresponding sub - menu function when the user simply drags his or her finger in a direction toward the corresponding sub - menu without actually contacting the sub - menu or when partially passing through the corresponding sub - menu . next , fig6 ( a )- 6 ( e ) illustrate the main menu “ ring tone ” and corresponding sub - menus being displayed in a variety of different arrangements . in more detail , and as illustrated in fig6 ( a ), the sub - menus can be displayed so as to surround only a part of a main menu . in other words , the sub - menus “ lamp ”, “ vibration ”, “ bell ”, and “ vibration + lamp ” are displayed only on the upper and right sides of the main menu “ ring tone ”. alternatively , as illustrated in fig6 ( b ), the sub - menus “ lamp ”, “ vibration ”, “ bell ”, and “ vibration + lamp ” are displayed only on the upper and lower sides of the main menu “ ring tone ”. further , the sub - menus may also be displayed next to the main menu without surrounding the main menu . in other words , as illustrated in fig6 ( c ), the sub - menus “ lamp ”, “ vibration ”, “ bell ”, and “ vibration + lamp ” are displayed only on the upper side of the main menu “ ring tone ”. alternatively , as illustrated in fig6 ( d ), the sub - menus “ lamp ”, “ vibration ”, “ bell ”, and “ vibration + lamp ” are displayed only on the right side of the main menu “ ring tone ”. further , as shown in fig6 ( d ), the sub - menus “ lamp ”, “ vibration ”, “ bell ”, and “ vibration + lamp ” are a distance d 1 from the main menu “ ring tone ”. alternatively , as shown in fig6 ( e ), the sub - menus “ lamp ”, “ vibration ”, “ bell ”, and “ vibration + lamp ” are displayed only on the right side of the main menu “ ring tone ” at a distance d 2 from the main menu “ ring tone ” ( rather than at a distance d 1 as in fig6 ( d )). in addition , even thought the direction d 2 is longer than the direction d 1 , the user can select the sub - menus that are a distance d 2 away from the main menu , by simply dragging their finger in the direction of the corresponding sub - menu . further , the sub - menus may be displayed only on the right side of the main menu ( as shown in fig6 ( d )) or may be displayed only on the left side of the main menu . next , fig7 ( a ) and 7 ( b ) are overviews illustrating a method of selecting a specific main menu and then selecting another main menu according to an embodiment of the present invention . in more detail , and as shown in fig7 ( a ), when the user selects a main menu setting option on the terminal , a plurality of main menus are displayed . then , when the user selects the “ ring tone ” main menu , the controller 140 displays the corresponding sub - menus related to the selected main menu on the touch screen 122 as shown in fig7 ( a ). further , as shown in fig7 ( b ), when the user selects the main menu “ receive message box ”, the controller 140 confirms the selection ( e . g ., by highlighting the selected main menu ) and displays the corresponding sub - menus . in other words , the controller 140 activates the main menu “ receive message box ”, which has been selected by the user , and displays the sub - menus “ received message box ”, “ sent message box ”, “ spam message ” and “ multimedia message ” corresponding to the main menu “ receive message box ” on the touch screen 122 . further , at the same time , the controller 140 deactivates the other non - selected main menus and sub - menus . next , fig8 ( a ) and 8 ( b ) are overviews illustrating a method of selecting a specific direction point on the touch screen 122 and then performing a dragging operation towards a particular item to thereby select the particular item according to an embodiment of the present invention . as shown in fig8 ( a ), the controller 140 displays a direction point 2 and a plurality of selectable items 4 on the touch screen 122 of the terminal . in this example , the plurality of items 4 corresponding to contacts that the user can call ( e . g ., home contact , babysitter contact , office contact , friend contact , etc .). however , the selectable items can be any one of a menu option , characters , icons , a uniform resource locator ( url ), a music file , a picture file , etc . then , when the user selects ( touches ) the direction point 2 and drags their finger in a particular direction toward an item 4 , the controller 140 senses the direction of the dragging operation from the selected direction point 2 toward the item 4 . the controller 140 then executes a corresponding item located in the sensed direction of the dragging operation . for example , as shown in fig8 ( b ), the controller 140 senses the user touches the direction point 2 and performs a dragging operation toward the home contact 4 in the upper right hand corner of the touch screen 122 . in this instance , the controller 140 would then perform a dialing operation to dial the home phone number included in the corresponding selected item 4 . as in the other embodiments , the controller 140 can execute a function corresponding to the particular item when the user just performs a dragging operation towards the item 4 , or when the user drags his or her finger all the way across or partially across the particular item 4 . note also that in fig8 ( a ), the touch direction point 2 is displayed as a bar , and when the user touches and performs a dragging operation , the controller 140 changes the displayed bar into an arrow pointing in the direction in which the user performs the dragging operation . thus , the user can easily confirm the direction of the dragging operation and the item to be selected . further , fig8 ( a ) and 8 ( b ) illustrate four selected items , but any number of items may be displayed . the items 4 may also be displayed in alternative arrangements as discussed above with respect to the menu options . in addition , when the item 4 is a music or picture file , the controller 140 plays the music file or displays the picture file in a full screen mode , for example . when the item 4 is a url , the controller 140 connects to the web page associated with the url . further , as described above , the user can select a sub - menu by dragging their finger in the direction of the sub - menu without actually touching the sub - menu , or may pass through all or only part of the sub - menu to select it . these different ways of selecting a sub - menu can be advantageously set by a user using the appropriate menu options provided on the mobile terminal . for example , the user may select a “ selecting sub - menus ” main menu option on the terminal and then select the appropriate method he or she desires to be used for selecting sub - menus . the user can also select an option such that the main menu is dragged in a direction of the sub - menu to select the corresponding sub - menu . further , the above - described embodiments refer to a mobile communication terminal . however , the present invention is also applicable to all types of terminals equipped with a touch device . in addition , it is also possible to select an item or menu option on the touch screen by selecting a particular point on the touch screen and then dragging a pointer in a direction of the item . as described above , the present invention has several advantages . first , the user can easily select a corresponding sub - menu or item that is displayed on the touch screen of the terminal . the selectable options provided on the terminal may also be freely arranged in any desired manner . the user can also easily determine which selectable option he or she has selected . as the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof , it should also be understood that the above - described embodiments are not limited by any of the details of the foregoing description , unless otherwise specified , but rather should be construed broadly within its spirit and scope as defined in the appended claims , and therefore all changes and modifications that fall within the metes and bounds of the claims , or equivalence of such metes and bounds are therefore intended to be embraced by the appended claims .