"In order to define beamless raft slabs whose elevations bend differently from each other in the program, it is necessary to change the level of the mat slab. The borders of the raft slabs at different levels are bounded by the slab edges drawn in common to each other. For example, a single slab edge is defined in the middle of two adjacent rafts, and the elevations of each of the two slabs are adjusted. The program automatically connects two mats with a vertical plate." I follow the definition exactly, but I can't make the connection between two rafts automatically with a vertical plate to the Program. It just shows the unmounted connection. Can you help me?