Hello rathinam,

To represent a Submachine state, drag and drop the target Statemachine diagram from the Structure Tree onto another Statemachine diagram open in the diagram editor.

1. Open a Statemachine diagram (Statemachine diagram B in the figure) in the Diagram Editor







2. Drag & Drop another Statemachine (Statemachine diagram A in the figure) onto the Diagrem Editor.







Cheers,
Satomi