A device with a graphical user interface, via which the functions of the device are controlled has functions divided into categories which are sub-divided into subcategories. The categories are represented by primary regions that are schematically arranged on the user interface. The primary regions contain elements, each of which represents a sub-category of the category of the respective primary region. In addition, only one primary region is expanded by the display of a secondary region after an element has been selected. The secondary region contains control elements for at least one function that is assigned to the sub-category representing the selected element. The at least one function is controlled by the control elements.