Abstract: A headboard and footboard are removably attached to a vertical multiply-slotted standard by means of keys to form a display unit. (These standards may be part of the display structure already mounted in a store). A number of panels are slideably mounted for independent travel back and forth within the confines of the headboard and footboard to reveal merchandise hung on the panels for display in a store. Means are provided to support the panels from the bottom, so that the sides and top of the display do not bear much weight. The panels and associated hardware can be individually moved forward or backward within the display to allow more or less space between two panels or to accommodate additional panels. When the panels are in the desired positions, they can be locked to prevent unwanted forward and back travel, but to allow panels to slide from side to side.Improved keys are utilized which lock to vertical standards.