An approach is described for supplementing a scrolling region of an item user interface (UI) presentation with scrolling-region information. For example, the scrolling region can be enhanced by presented information regarding a flattened list of containers. The approach may also involve varying a representation of a collection of items displayed in an item presentation region of the item UI presentation based on at least one emphasis-related attribute associated with the collection of items. The various features of the item UI presentation facilitate a user's navigation through a large collection of items.