A positioning jig which is applied to a spray polishing device which sprays a polishing liquid to a material to be polished and polishes the material to be polished, determines a relative position of a material to be polished and a polishing liquid spraying nozzle. The system utilizes a session manager and a transport stream generator to enable a set top terminal to access an entire array of guide pages from the IPG within the constraints imposed by the limited bandwidth available in the distribution network. A closure element is supported by an operating mechanism and is adjustable between a closed position, in which it closes the roof opening, and an open position. As attached, the fabric pieces may include a non-flat orientation to facilitate the three-dimensional effect. One gripping disk that is spaced apart from the ink receiving roller is thereby provided at each free end of the ink roller axis. The method may provide viewing distance information to a user during the design process, thus allowing the user to more intelligently specify various criteria for the sign, such as sign size, imagetext size, etc.