Automatic Harp Pedalling instructions

Is is possible to tell Dorico to provide harp pedals for an entire Flow, or do I have to add a diagram manually until I’ve got rid of all the red notes?

I’ve tried selecting All and then Add Harp Diagram, but I only get one.

I’m pretty sure you have to set each harp pedal (diagram) change when you come across new red notes.

Yes, indeed, you must decide where the harp pedal changes should go, but Dorico can work out what pedals are then required from that point until another pedal change will be needed.