Electronic device having touchscreen and input processing method thereof

A method for operating an electronic device including a touch screen, the method comprising:

• displaying, on the touch screen, one or more graphic user interface (GUI) items included in a setting menu of an application;
• receiving a first touch input in respect to a first GUI of the one or more GUI items;
• receiving a second touch input in respect to a second GUI of the one or more GUI items;
• storing first information on a first external input object and a first drawing attribute, corresponding to the first GUI, associated with the first external input object according to receiving the first touch input;
• storing second information on a second external input object associated with a second drawing attribute corresponding to the second GUI according to receiving the second touch input, wherein the second external input object is different from the first external input object;
• receiving a touch input on the touch screen;
• determining whether the received touch input is input using the first external input object or the second external input object;
• identifying drawing attribute for the touch input from the stored information based on the determination;
• and
• applying the identified drawing attribute to the touch input.