When you first add a board you can define the number of phases and circuits for the board. Once added the way to add or delete circuits is described below:
Click the green + button to add an extra circuit until you reach the desired number
The number of circuits is now 9
To delete a circuit, click the circuit as shown below so that it is highlighted in pink and click the bin at the end of the row
After you have clicked the bin you will see a warning asking you to confirm your selection
