About Assembling Predefined Components
To assemble predefined EMX components, click > 
Assemble predefined components. Select an assembly or part that has reference groups with predefined components. The component information is read from the reference group and the assembly is assembled and cut.
Assemble predefined components. Select an assembly or part that has reference groups with predefined components. The component information is read from the reference group and the assembly is assembled and cut.You can predefine any component by selecting the Predefine Component check box during its definition.