Help -- apply the script running weight inside of the Vugen Run-Time Settings

I have used the percentage on each Action within Vugen  Run-Time Settings. For example, during each iteration, Action a will run 20% of time, Action b will run 50% of time, and Action c will run 30% of time. It is basically apply the weight to the runtime.

I have not been doing that for years and with the newer version (11.5), does anyone know how to do it?

Thanks!