Abstract: A multifunctional mechanical display system comprises one or more signboards each having a substantially planar display area with a first bar member that preferably includes a plurality of posts which may be received in any of one or more parallel sets of openings through the signboard to position the first bar member at any of a plurality of parallel, spaced apart positions. Preferably, raised borders around the display area are parallel to the sets of openings and the first bar member and have, with the first bar member, facing sides which are adapted to receive and removably retain therebetween one or more planar, resiliently flexible inserts bearing preprinted indicia. Additional pins are further provided on the rear side of each signboard coinciding with one or more openings through the narrow sides of each signboard to permit the signboards to be joined together into larger signboards, to permit signboards to be mounted back-to-back, or both, through modular support members.