Changing Physics2.0 Mask Behavior on the Fly


Good day there! Nice non-techy IDE for building 2D games made a little less complex. But I got a concern though, how can we change the physics2.0 behaviour mask or layer on the fly. I mean, like the one with the sprite jumpthru platform behaviour where collisions happen after an object passes beneath it first. If it is already implemented, how?

Also, how do I add physics2.0 collision inside the objects boundaries? Like a group of objects and pass another object to it applying collisions.