Abstract: An interface providing method includes setting information of screen configuration involving at least one or more elements to be executed in a terminal. The method further includes providing an operation interface on a screen of the terminal by executing the elements involved in the information of screen configuration.

Abstract: A mobile communication terminal has a basic button unit including at least one of a home button, a back button, an option button, and a search button, and at least one button of the basic button unit is formed on a side of the mobile communication terminal. The mobile communication terminal may further include a button signal recognizer configured to generate an additional function event signal according to a previously set form of a button signal generated from the button formed on the side of the mobile communication terminal and an additional function performer configured to perform an additional function previously set in an application currently executed in the mobile communication terminal or a current screen state when the additional function event signal is generated.