A retail display system for increasing density of merchandising of products, by using the otherwise unused space of existing display configurations. A hanger display configuration, which may hold vertical strip displays, is installed in such a manner as to adapt to a diverse range of product packaging and shelving fixture types, efficiently provide signage, pricing and scanning information, and to reduce theft. The hanger display configuration can be manufactured for a specific product and specific quantity of such product. Faceplates have clamps on the rear face for clamping the faceplates to seldom-used non-shelve portions of the rack display and other store fixtures, such as bars, stanchions, corners, etc.