Previously, there was no specific function for footer. So you had to copy a bunch of blocks at the bottom of every page of your website. This tip allowed to create a “manual” footer. There were several problems with this tip:
You had to manually change the position of all blocks when adding content to the page (to push them downward)
If you wanted to modify a block in the footer, you had to adjust the position of all duplicated blocks, on every page.
The footer was not optimized for mobiles
If you have used this process for your footer, here is a tutorial to move your manual footer into the new footer system:
Go to one of the pages containing all the blocks of your footer (or go to the background page if you had created a manual footer in the background)
Select all the blocks of the footer
Right click and select “Add to footer”. The blocks will automatically move to the new footer, and will remain at their locations
On each one of the other pages, select all the footer blocks, and delete them
Finally, you may have set a different Menu block for all footers. If you want this menu (which is now in your new footer) to be properly displayed on all pages, you will have to re-configure it.
Modify your Menu block by checking all your website pages