Creating a signal
You can create a Signal through a Class Diagram or a Modeler pane.
To create a signal through a class diagram:
1. On the Class Diagram tab, click the 
Signal button, and then click on the diagram in free space or within a Package.
Signal button, and then click on the diagram in free space or within a Package.If you click within a Package on the diagram, the Signal is created as a child item of that Package.
2. Type the name of the Signal, and then press the Enter key.
To create a signal through a Modeler pane:
1. In a Modeler pane, locate the item that is to own the Signal, that is, a Package, Class, Interface, Signal or the Model.
2. Right-click the owning item, and select > or select > > > .
3. Type the name of the Signal, and then press the Enter key.