How do I use 'Dynamic mesh preview' in Blender 2.81? A new feature called the dynamic mesh preview was added in blender 2.81 for the sculpt mode, but, I can't see a way of using it. I was trying to try it out but I don't know how to toggle this on or off. Any guide would be really helpful.  

EDIT: It seems the preview doesn't work with multires and works with subdiv surf modifier instead.
It's a bit counter intuitive because there's nothing saying, dynamic mesh preview, instead this feature seems to only work with the grab brush, when you tick the grab active vertex checkbox in the brush settings: