Macs don't have screenshot buttons

I'll explain it better, though. I made it have larger margins on my forum (30, not 10) and I would like to make a new banner that stretches across the top of the actual forum. If I do this currently, the buttons just move over, making the user have to scroll over to the right to see the "Members" "Register" "User CP" etc buttons. Here is a diagram of what I want:
This is how it's set:
Banner---------------buttons
------------forums------------
This is how I want it:
---------Banner----------
---------buttons----------
---------forums----------
(---------text---------- equals centered image/text)
Get what I mean now?