A display system comprising: an input apparatus comprising a button and a touch pad; and a display apparatus, the display apparatus comprising: a display unit; an image processor configured to process an image signal to display an image on the display unit and configured to display a UI menu which concerns a plurality of items (620, 630) to be selected; a communication unit configured to communicate with the input apparatus; and a controller configured to control the image processor to display the UI menu in response to a first input from the input apparatus; characterised in that: the controller. is configured, in response to the first input of the input apparatus only by using the button, to display on the display unit the UI menu as a brief GUI element to include only a first item of the plurality of the items (620, 630) of the UI menu, wherein the controller. is configured, if a second input is made by a manipulation of the button from the input apparatus while the UI menu is displayed, the second input being subsequent to the first input, to display the UI menu still as the brief GUI element to change the first item into a second item of the plurality of the items being different from the first item, and wherein the controller. is configured, if the second input is made through the touch pad from the input apparatus while the UI menu is displayed, to change the brief GUI element to display the UI menu instead as an enlarged GUI element which comprises a list including the plurality of the items (620, 630) to be selected, wherein the controller is configured to change the brief GUI element to the enlarged GUI element only when the brief GUI element has been displayed after the first input using the button. an input apparatus comprising a button and a touch pad; and a display apparatus, the display apparatus comprising: a display unit; an image processor configured to process an image signal to display an image on the display unit and configured to display a UI menu which concerns a plurality of items (620, 630) to be selected; a communication unit configured to communicate with the input apparatus; and a controller configured to control the image processor to display the UI menu in response to a first input from the input apparatus; a display unit; an image processor configured to process an image signal to display an image on the display unit and configured to display a UI menu which concerns a plurality of items (620, 630) to be selected; a communication unit configured to communicate with the input apparatus; and a controller configured to control the image processor to display the UI menu in response to a first input from the input apparatus; the controller. is configured, in response to the first input of the input apparatus only by using the button, to display on the display unit the UI menu as a brief GUI element to include only a first item of the plurality of the items (620, 630) of the UI menu, wherein the controller. is configured, if a second input is made by a manipulation of the button from the input apparatus while the UI menu is displayed, the second input being subsequent to the first input, to display the UI menu still as the brief GUI element to change the first item into a second item of the plurality of the items being different from the first item, and wherein the controller. is configured, if the second input is made through the touch pad from the input apparatus while the UI menu is displayed, to change the brief GUI element to display the UI menu instead as an enlarged GUI element which comprises a list including the plurality of the items (620, 630) to be selected, wherein the controller is configured to change the brief GUI element to the enlarged GUI element only when the brief GUI element has been displayed after the first input using the button.