Abstract: The movement of first and second sliders on a user interface of a data processing system is loosely coordinated by way of pusher member. The pusher is coupled to one of the sliders and extends over to the other slider, where it is adapted to contact a side of the other slider. The sliders move independently of each other if the pusher does not contact the other slider, as in for example, the sliders moving apart. If the pusher does contact the other slider, then both sliders become ganged and move in unison.

Abstract: A method for maintaining a record of set-creating data processing activities and associated data sets. The method includes the steps of creating and displaying a plurality of visual representations, one for each of the set-creating activities, and arranging the visual representations to indicate a hierarchical relationship within the set-creating activities. The visual representations may be used to select for viewing a particular one of either the set-creating activities or the associated data sets, and displaying them on the data processing system. The display may correspond to a duration of an operator input activity, or to a time interval defined by an initiating operator input at a terminating operator input. In its simplest form, the method requires the arrangement of the visual representations in a hierarchy which corresponds to set-creation chronology.