Forum:How can I display the latest user to modify a page?

I want to make it so that every page on my wiki shows who the last user was to make a change on a page. Is there a way to add in a line of code at the top of each page?

Additionally, is there a way that I can set this globally across the wiki to avoid having to insert this manually into each page (which would essentially make ME the last author for any new page, even if I didn't create it)?

Really new at this - appreciate any help.

Thanks!

Sean