You can easily set circuits as spares on the circuit details page of a cert.
In update v184.108.40.206, we added colour coding to this section to make it even easier to distinguish between circuits.
There are a couple of ways you can set a circuit as a spare:
Firstly, add a new circuit by selecting the plus icon, then you can right-click on the circuit row and select 'Set as Spare Circuit’.
Alternatively, you can also type ‘spare’ or ‘final’ into the circuit description to set it after adding a new circuit. This will automatically colour code the circuit accordingly.
To remove the spare, right-click on the row and select 'Clear Spare Circuit', or click on the minus icon when the row is selected to completely remove the circuit.