Staad Pro Advanced V22 Update 7 - Creating Load Envelope in Physical Modeler

I need to create two  load envelopes for strength and deflection checks.

I'm using physical modeler for creating the model , therefore the envelope loads can not be created in Analytical model. How could I create envelopes in physical modeler?

In general , the work flow of using physical modeler and two design parameters is not clear, how it could be?