Hevacomp System Builder Ductwork Issue

Hi

I am using system builder within Hevacomp to size a variety of services and am running into problems regarding the ductwork. I have selected a default grille type for both supply and extract systems, placed them in the desired rooms and connected them all up with the ductwork and the system works fine. The issue I am having is when I am viewing the Outlet Schedule, the details of the outlet schedule are showing the default values that I have specified previously, I am mainly interested in the Neck Size and Face Size. Is it possible for Hevacomp to automatically update these sizes based on the size of the connecting duct or do I need to go through each grille individually and update them manually?

Any help would be greatly appreciated.