Is it possible with the use of vc elements etc. to create a footer banner or a centered button at the bottom of any site, then when user click on the banner / button it opens a dropdown area that opens upwards (opposite of the dropdown menus) ?
I have seen several sites having this option and when users click the banner / button it opens a 300-400px high area with some special offers.
You can use this element in any place of the page.
If you want to use it in sidebar/header/footer, you need to create HTML block and insert it in the appropriate area. You can find how you can apply the HTM block here https://xtemos.com/docs/woodmart/html-blocks-2/