A display interface system for computer controlled displays including a window in a display screen, for the display of visible data; a set of selectable items in the portion of said display screen; an implementation for varying the area of the display screen portion; and for varying the comprehensiveness level of the items in response to the varying area of the display screen portion. It is often the case that the area in a window needs to be reduced for any of a variety of purposes. In such a situation, the items in the menu are maintained at a high level of comprehensiveness, e.g. icon plus explanatory text, while its window area is greatest. Then, as the window area is reduced, the levels of comprehensiveness of the items in the menu or set are also reduced since the space can no longer accommodate them.