A bulk-selection control is described in which the same user input action automatically causes both (a) scrolling of a list of visual indicators of items, and (b) selection of the items that correspond to the visual indicators. Specifically, as the visual indicator of an item is scrolled beyond a “selection-triggering position”, the visual indicator is visually marked to indicate that the corresponding item is selected, and the corresponding item is automatically added to a set of selected items. When scrolled the opposite direction, the items that have already been added to the set of selected items are not removed therefrom, even if the scrolling operation causes their visual indicators to cease to be beyond the selection-triggering position.