You can create a graphical link between any two symbols in the diagram. This link is purely graphical and does not convey any semantics.
- Select the Polyline tool in the Toolbox.
- Click inside the first symbol and while continuing to hold down the mouse button, drag the cursor to a second symbol. Release the mouse button inside the second symbol and right-click.
A link is created. You can double-click the link symbol to open the Link Symbol Text dialog box and edit the link.