Blender 2.8 mirror modifier and sculpting

I am sure there is way to have a mirror modifier work in sculpt mode. How do I do it?

there are two ways.

  1. mirror modifer in object mode, that mirrors only the whole object.(usefull for seperate eyes objects)
  2. symmetry in sculpt mode,there you can lock the mirror ( the active object surface) for face symmetry ect.