1. A data processor controlled user interactive display interface comprising: a tree view of selectable elements arranged in a hierarchy in one region of a display interface screen, at least one of said selectable elements having a plurality of different types of child elements, and means responsive to the selection of an element having child elements of different types for displaying attributes of said child elements in a plurality of separate screen regions, each screen region respectively containing the attributes of one of said different types of elements, wherein each different type of child element has different displayed attributes.