In the customized OPC library, under Functions, select the function you want to link the symbol to (for example, Automatic Fire Detector).
Click the Model & Functions tab.
Open the Symbol expander.
In Windows Explorer of the PC, open the symbol folder of the customized OPC library, for example: GMSProjects\[Project]\libraries\Fire_Device_OPC_Project_1
Drag the CCS file of the symbol (for example, DYN_3D_Fire_OPC_Detector_Ceiling_None_Horizontal_001.ccs) to the Symbol expander.
The symbol displays in the Symbol expander.
Right-click the symbol, select Style and select a graphic style (for example, 3D).
Right-click the symbol and select Set as Default.
Click Save .
The new symbol is associated to all data points which use the function.