Huh?
Um,

not quite, lol.
You control the page headers in the templates.
Find the templates by clicking 'Modify' in the ACP (left frame menu right down the bottom) and click the 'expand all' button in the new page, and find the header template. Just put your code into there where you want it to appear and it will appear at the top of all pages.
Hope this helped.
Dave.