Objects of the present invention are to provide a positive working presensitized plate of a thermal type, which has damage resistance, and which is handled easily in conventional operation, high in sensitivity and excellent in press life when used as a lithographic printing plate, and to provide a support for a lithographic printing plate, which is suitably used for the same. The retention system includes pins for resisting axial movement of the lock ring and assemblies for limiting radial outward movement of the lock ring. If patrons visit business during off-peak hours they receive maximum amount of discount, while visiting during rush hours carries minimum amount of discount for customers. The panels are repositioning such that the inner surfaces are in a facing relationship.