A server machine manages and presents a user interface. The user interface presents search results, and the server machine receives a cursor input that corresponds to a particular search result. The particular search result references an item available for purchase, and the item is described by descriptors. Responsive to the cursor input, the user interface presents a preview window that contains a descriptor not shown in the particular search result. The server machine receives a further cursor input that indicates the item is to be included in a list of items. Responsive to the further cursor input, the user interface presents a list of items as including an icon that references the item. The icon indicates that the item is included in the list of items.