Does the A350's AutoStepClimb function support descending to a lower altitude?

[Tim Cui]

As described in the title: if I change the flight direction and set a StepClimb in the FMS to descend from FL390 to FL380, can AutoStepClimb execute this operation automatically? Additionally, if I switch from metric RVSM to imperial RVSM and need to descend from FL371 to FL370, can AutoStepClimb complete this descent process?