A method of displaying an on-screen graphical user interface, the method comprising providing a plurality of user-selectable icons, and a plurality of content icons representing respective items of contents; generating image data for the on-screen user-interface with a multi-dimensional array which includes a first axis comprising the plurality of user-selectable icons adapted to be arranged in a specific direction and which is also adapted to include a second axis comprising the plurality of content icons in a direction intersecting, or abutting, the first axis; and outputting the image data for the on-screen user interface related to displaying the contents to a display, wherein the generating displays the second axis to intersect, or abut, the first axis.