hfss symmetry planes

hello,

i am trying to simulate a structure that is symmetric around xz-plane. is there a symmetry plane definition in HFSS that i can use to decrease the computation space and time?

you may use a perfect E or perfect H according to the kind of symmetry plane you have. e.g. if the electric field is perpendicular to the plane use a perfect E, if it is parallel to the plane use a perfect H

actually, i have tried using both in some structures and learned how to use it, but still thanks a lot for your answer ;)