[TYPO3-english] Where can I find the page's header/footer content?

[Ioana V.]

Hi,

I need to change some text in the header and footer of a website that uses TYPO3. I'm not a TYPO3 expert, I've only used it a couple of times a year to update static pages so far. I'm stuck now that I have to change the header and footer. My understanding is that I should make the changes somewhere in the template since they appear on all pages, but once I login on the backend, I can't find anything related to templates.
Can someone point me in the right direction, please? Thanks.