You can put multipliers in the "load case options" tab, e.g., 1.1W + P, and also I believe 1.1L7 ... also. See the help screens or the manuals.
Set up max and min cases and use multipliers if you desire. just make sure you pick disp/force vs disp/force/stress for the output type to avoid having to explain higher stress that are not applicable to the design.
Check it out.
_________________________
Bob Zimmerman, P.E.
Vice President of The Piping Stress International Association (The PSI)