How to add a label to a connector?
You can add a label a label between shape A and shape B by making the connector visible (TAB key after the Shape A) and then by typing a label – E.g. Data – as shown below.
For a decision bridge, the connectors are visible (identified by the arrow in the text editor). Adding a label is optional. If you don’t, you will see the “no label” indication in the text editor and your connector will be displayed without a label in the graphical canvas.