Display apparatus for performing function of user selected menu item on a user interface and method for controlling display apparatus

A display apparatus comprising:

• a display;
• a single physical button;
• and
• one or more processors configured to:
• receive a user input via the single physical button while a guide user interface (UI), a plurality of menu items and a selection user interface (UI) are displayed on the display, the guide UI indicating a first function corresponding to a short click input and a second function corresponding to a long press input;
• based on the user input received via the single physical button being identified as the short click input, control to move the selection UI from one menu item of the plurality of menu items to another menu item of the plurality of menu items while the guide UI and the plurality of menu items are displayed on the display;
• based on the user input received via the single physical button being identified as the long press input, control to select the one menu item among the plurality of menu items in which the selection UI is located and to execute a function corresponding to the selected one menu item while the guide UI and the plurality of menu items are displayed on the display,
• wherein the guide UI includes a first text UI corresponding to the first function and displayed on the display, and a second text UI corresponding to the second function and displayed on the display,
• wherein the first text UI comprises a first name of the first function corresponding to the short click input and displayed on the display and a first text indicating the short click input and displayed on the display, the first name indicating movement of the selection UI, and
• wherein the second text UI comprises a second name of the second function corresponding to the long press input and displayed on the display and a second text indicating the long press input and displayed on the display, the second name indicating selection of a menu item of the plurality of menu items.