Divi Theme Visual Builder Update Custom Headers And Footers

systeam22 site ....contact page 'menu' is disappeared

I'm using Divi and have a custom footer on my pages. If I edit my custom footer using Visual Builder on one of my pages, will it change the footer across all of my pages that have this same custom footer? I only want to make a change to the footer on one of my pages, not all of them. Thank you.