Right now, Im building a webpage. Im starting with the index first.
I heard that with CSS you can build say, a header that you want to appear in the entire site, then instead of changing the header on each page, you just change the header once, and it loads the new header on every page.
Does anyone know how to do this?
What do I save my headers, sidebars, footers as? and how do I load them on to the page.
I could use some help! Thanks :pleased:
PS. Or you could tell me sort what its called that i’m looking for, then I can find it on my own 
