An electronic device comprising: a display comprising a main display area and a curved auxiliary display area that is extended from the main display area in an integrated manner, is curved toward one side of the main display area, and is smaller than the main display area; a detector configured to detect touch input on the display; and a controller configured to: control the display to provide first UI element on the main display area; control the display to provide second UI element on a first area of the curved auxiliary display area; and determine whether the electronic device is gripped by a hand of a user while the first UI element is provided on the main display area and the second UI element is provided on the first area of the curved auxiliary display area, based on a first touch input detected on the main display area and the curved auxiliary display area; characterised in that: the controller is configured, in response to the electronic device being determined to be gripped by the hand while the first UI element is provided on the main display area and the second UI element is provided on the first area of the curved auxiliary display area: determine a second area of the curved auxiliary display area, the second area being in accordance with the locations that the user can touch with the thumb of the hand while the electronic device is gripped by the hand, based on the first touch input that is detected on the main display area and the curved auxiliary display area; and control the display to move the second UI element provided on the curved auxiliary display area, from the first area of the curved auxiliary display area to the second area that is determined, while maintaining the first UI element provided on the main display area. a display comprising a main display area and a curved auxiliary display area that is extended from the main display area in an integrated manner, is curved toward one side of the main display area, and is smaller than the main display area; a detector configured to detect touch input on the display; and a controller configured to: control the display to provide first UI element on the main display area; control the display to provide second UI element on a first area of the curved auxiliary display area; and determine whether the electronic device is gripped by a hand of a user while the first UI element is provided on the main display area and the second UI element is provided on the first area of the curved auxiliary display area, based on a first touch input detected on the main display area and the curved auxiliary display area; characterised in that: the controller is configured, in response to the electronic device being determined to be gripped by the hand while the first UI element is provided on the main display area and the second UI element is provided on the first area of the curved auxiliary display area: determine a second area of the curved auxiliary display area, the second area being in accordance with the locations that the user can touch with the thumb of the hand while the electronic device is gripped by the hand, based on the first touch input that is detected on the main display area and the curved auxiliary display area; and control the display to provide first UI element on the main display area; control the display to provide second UI element on a first area of the curved auxiliary display area; and determine whether the electronic device is gripped by a hand of a user while the first UI element is provided on the main display area and the second UI element is provided on the first area of the curved auxiliary display area, based on a first touch input detected on the main display area and the curved auxiliary display area; characterised in that: the controller is configured, in response to the electronic device being determined to be gripped by the hand while the first UI element is provided on the main display area and the second UI element is provided on the first area of the curved auxiliary display area: determine a second area of the curved auxiliary display area, the second area being in accordance with the locations that the user can touch with the thumb of the hand while the electronic device is gripped by the hand, based on the first touch input that is detected on the main display area and the curved auxiliary display area; and the controller is configured, in response to the electronic device being determined to be gripped by the hand while the first UI element is provided on the main display area and the second UI element is provided on the first area of the curved auxiliary display area: determine a second area of the curved auxiliary display area, the second area being in accordance with the locations that the user can touch with the thumb of the hand while the electronic device is gripped by the hand, based on the first touch input that is detected on the main display area and the curved auxiliary display area; and control the display to move the second UI element provided on the curved auxiliary display area, from the first area of the curved auxiliary display area to the second area that is determined, while maintaining the first UI element provided on the main display area.