Abstract: A user interface includes one display area in which a set of cards is displayed and another display area in which a set of proxies is displayed. Each card includes content that can be displayed, although not all of the cards can be displayed concurrently. Each proxy in the set of proxies corresponds to one of the cards in the set of cards, including the subset of cards that is displayed at any one time as well as the cards that are not displayed. The set of proxies can be used to sort and navigate the cards in the set of cards in various manners, including dragging and dropping a proxy to change the order of the proxies and the corresponding cards, selecting one of the proxies to display the corresponding card, and displaying a name or other information for a card when hovering over the corresponding proxy.