Set Offscreen Bounds clarification

So, when I set offscreen bounds, does that mean in relation to the camera or in relation to the scene?  Just curious.

It's in relation to the camera i.e the screen.

I read somewhere that this affects ALL actors, is this true?  Or is it only for the actor that is attached to?

I figured it out.  It seems to affect all actors, but the Top, left, bot, right do not require extra math.  It seems like the blocks acts more like additional padding outside of that side of the screen.  Thanks for the input.