Unfortunately, that's not the case. I wish it was that simple (I've played around with this a lot in the past). Your banner is a good example of this (sorry to point it out

) but the positioned elements like the RPM logo don't work right on my 13" Macbook Air screen because you probably designed it on a 15" monitor (or at least a larger one than mine). So they don't always disappear on smaller monitors (if my monitor was even smaller than it is, then it would) but as it is right now, I'm just seeing half of it.