THE HAMBURGER BUTTON, SO NAMED FOR ITS UNINTENTIONAL RESEMBLANCE TO A HAMBURGER, IS A BUTTON TYPICALLY PLACED IN A TOP CORNER OF A GRAPHICAL USER INTERFACE. ITS FUNCTION IS TO TOGGLE A MENU (SOMETIMES REFERRED TO AS A HAMBURGER MENU) OR NAVIGATION BAR BETWEEN BEING COLLAPSED BEHIND THE BUTTON OR DISPLAYED ON THE SCREEN.