Use the Switch Phases tool to assign a phase to a circuit in a switchboard panel.
Prior to this enhancement, 1- and 2- pole circuits are always connected to Phase A when connected to a switchboard, so it was not possible to specify the phase to which a load was connected.
With this improvement, the Switch Phases tool in the Switchboard Panel Schedule view toggles the phase to which the circuit is connected. Loads on the switchboard bus update accordingly.
This feature was suggested by customers on the Ideas forum (1, 2) and is described on the product road map.