Advertising poster display frame

A document display unit, characterized in that it comprises a support plate, a framing border dimensioned so that its outer edge registers with said plate and its inner edge overlies said plate a selected distance from the plate edge, and mouldings having a resilient, generally U-shaped cross-section whose legs are shorter than the width of the border for engaging over the peripheral edge margins of said registering plate and border, said mouldings having inwardly projecting longitudinal ridges so that when the mouldings are engaged over the edge margins of the registering plate and border, they clamp the plate and border together on opposite sides of said ridge, thereby providing a selected spacing between the plate and border for the document to be displayed while exposing an edge margin of said border inboard of the mouldings all around the document.