The library TB-SYMKEYS helps you create HMI applications with flow charts efficiently, . for water management applications. The new library supports both GT and GN terminals. For GT panels, this product contains a floating icon library and four key libraries which can be integrated into GTWIN. For the GN series, this product contains sample projects for Movicon with all symbols. Each symbol functions as a button that can open a new page, switch equipment directly, or just as call up info. The functionality is supported by a comprehensive PLC program that animates the flow chart objects. These libraries can.