RAM Concept Program Reinforcement Default Size

How do I go about changing the default size used by Concept when it assigns Program Reinforcement? I have a mat of steel already assigned to my slab, entered as User reinforcement. I'm relying on Concept to tell me what additional steel I need to make the design complete. It's working well, but it's assigning a #5 bar, and I'd like a #7 bar. How do I change the default setting from a #5 to a #7?

Thanks!