You may attach one or more child diagrams to any symbol type within an XML diagram. The diagram in which the symbol is contained becomes the parent diagram.
A child diagram generally provides greater detail of the symbol.
To create a child diagram
1 Open the diagram containing the symbol you want to attach the diagram to.
2 Right-click the symbol, and then click Child Create, or select the symbol and then click Edit > Child Diagram > Child Create.
3 Click OK to the dialog that asks if you want to save the current diagram. You must save the current diagram now to create the child diagram.