Change Zbrush's default mirro axis?

voronov.art

I'm working on a project that uses Z axis so all the objects are facing X+ axis. I know I can change the mirror axis of each object, but how do I save it so it doesn't reset the next time I load ZPR? Or may be there's a way to change Zbrush's default mirro axis from X to Z?

gnoop

it's in Transform menu