help with banners

I acquired a theme where there are 2 banners on the side and 2 on the footer, all of which are changed by modules that came with the theme to change the images or link I need to access extensions > modules and look for the banner module that I want to change, I would like to implement one Fastest way to change these banners, for example by design > Banners, could someone help me and explain how I can code this, thanks