Abstract: A touch screen device allowing a selective input of a free line according to the present invention first displays, when a user applies a touch input onto a touch screen, a free line according to the touch input on the touch screen, removes the free line when an additional touch input is not applied within a predetermined threshold time, and maintains the display of the free line when an additional touch input having predetermined fixed gesture information is applied onto the touch screen, so that only when the user applies a right touch input onto the touch screen, the touch screen device supports the user to fix the free line input by the user, thereby promoting convenience to the user.

Abstract: A touch screen device capable of executing an event based on a gesture combination according to an exemplary embodiment of the present invention, and an operating method thereof maintain a command database storing a plurality of predetermined gesture combinations, in which two or more gestures are sequentially combined, and commands corresponding to the plurality of predetermined gesture combinations, and confirm a gesture combination according to two or more touch inputs when a user inputs the two or more touch inputs onto a touch screen with an interval within a predetermined time, extract a command corresponding to the gesture combination from the command database, and execute an event corresponding to the extracted command.

Abstract: The present invention provides a method of operating an electronic document editing apparatus capable of inserting a memo into a paragraph, the method including: when a user points a first point of a first paragraph among a plurality of paragraphs included in an electronic document and then inputs a memo insertion command for the first point, dividing the first paragraph into two paragraph blocks based on the first point of the first paragraph based on the memo insertion command, and generating a blank space for inserting a memo between the two paragraph blocks.

Abstract: A touch screen device enabling an entity to be shifted or copied based on a touch input and an operating method thereof according to exemplary embodiments of the present invention may provide a function of shifting or copying entities included in an electronic document only with an application of a simple touch input onto a touch screen by a user, thereby promoting convenience of the user who desires to write or edit the electronic document on the touch screen device.

Abstract: A touch screen device capable of executing an event based on a gesture combination according to an exemplary embodiment of the present invention, and an operating method thereof maintain a command database storing a plurality of predetermined gesture combinations, in which two or more gestures are sequentially combined, and commands corresponding to the plurality of predetermined gesture combinations, and confirm a gesture combination according to two or more touch inputs when a user inputs the two or more touch inputs onto a touch screen with an interval within a predetermined time, extract a command corresponding to the gesture combination from the command database, and execute an event corresponding to the extracted command.

Abstract: A touch screen device allowing a selective input of a free line according to the present invention first displays, when a user applies a touch input onto a touch screen, a free line according to the touch input on the touch screen, removes the free line when an additional touch input is not applied within a predetermined threshold time, and maintains the display of the free line when an additional touch input having predetermined fixed gesture information is applied onto the touch screen, so that only when the user applies a right touch input onto the touch screen, the touch screen device supports the user to fix the free line input by the user, thereby promoting convenience to the user.

Abstract: The present invention provides a method of operating an electronic document editing apparatus capable of inserting a memo into a paragraph, the method including: when a user points a first point of a first paragraph among a plurality of paragraphs included in an electronic document and then inputs a memo insertion command for the first point, dividing the first paragraph into two paragraph blocks based on the first point of the first paragraph based on the memo insertion command, and generating a blank space for inserting a memo between the two paragraph blocks.