Method of controlling a list scroll bar and an electronic device using the same

A method controls a list scroll bar, including displaying a partial area of a list having at least one first item, and a first list scroll bar to scroll the list; expanding and displaying a first index area having at least one first index corresponding to the at least one first item in the first list scroll bar; downscaling a second index area having at least one second index corresponding to at least one second item different from the at least one first item and displaying a representative second index representing the second index area in the first list scroll bar; and upon detecting a gesture to select the representative second index, expanding and displaying the second index area in the first list scroll bar while downscaling the first index area and displaying a representative first index representing the first index area in the first list scroll bar.