1. An electronic device comprising: a touch display that comprise a main display area and a curved sub display area (1020, 1030) each corresponding to a front surface and a side surface of the electronic device, the curved sub display area being smaller than the main display area; and a controller, the controller being configured to: control the touch display to display a page including a text on the main display area and a menu for managing the page including plurality of objects on the curved sub display area (1020, 1030), the menu including at least two of a bold type object, an italic type object, an underbar object, a cancellation line object and a font size change object, receive a first finger touch input for selecting a first object and a second finger touch input for selecting a second object, wherein the first object and the second object are included in the menu displayed on the curved sub display area (1020, 1030), receive a first pen touch input moved along a trajectory on the main display area while the first object and the second object are selected; and visually transform and display a region of the text corresponding to the trajectory moved by the first pen touch input by simultaneously applying a first function corresponding to the first object selected by the first finger touch input and a second function corresponding to the second object selected by the second finger touch input, wherein the controller is further configured to: receive the first finger touch input and the second finger touch input through a touch panel mounted under the curved sub display area of the touch screen, and receive the first pen touch input through a pen recognition panel mounted under the main region of the touch screen. a touch display that comprise a main display area and a curved sub display area (1020, 1030) each corresponding to a front surface and a side surface of the electronic device, the curved sub display area being smaller than the main display area; and a controller, the controller being configured to: control the touch display to display a page including a text on the main display area and a menu for managing the page including plurality of objects on the curved sub display area (1020, 1030), the menu including at least two of a bold type object, an italic type object, an underbar object, a cancellation line object and a font size change object, receive a first finger touch input for selecting a first object and a second finger touch input for selecting a second object, wherein the first object and the second object are included in the menu displayed on the curved sub display area (1020, 1030), receive a first pen touch input moved along a trajectory on the main display area while the first object and the second object are selected; and visually transform and display a region of the text corresponding to the trajectory moved by the first pen touch input by simultaneously applying a first function corresponding to the first object selected by the first finger touch input and a second function corresponding to the second object selected by the second finger touch input, control the touch display to display a page including a text on the main display area and a menu for managing the page including plurality of objects on the curved sub display area (1020, 1030), the menu including at least two of a bold type object, an italic type object, an underbar object, a cancellation line object and a font size change object, receive a first finger touch input for selecting a first object and a second finger touch input for selecting a second object, wherein the first object and the second object are included in the menu displayed on the curved sub display area (1020, 1030), receive a first pen touch input moved along a trajectory on the main display area while the first object and the second object are selected; and visually transform and display a region of the text corresponding to the trajectory moved by the first pen touch input by simultaneously applying a first function corresponding to the first object selected by the first finger touch input and a second function corresponding to the second object selected by the second finger touch input, wherein the controller is further configured to: receive the first finger touch input and the second finger touch input through a touch panel mounted under the curved sub display area of the touch screen, and receive the first pen touch input through a pen recognition panel mounted under the main region of the touch screen. receive the first finger touch input and the second finger touch input through a touch panel mounted under the curved sub display area of the touch screen, and receive the first pen touch input through a pen recognition panel mounted under the main region of the touch screen.