If you are using Prestashop 1.6 and need to customise/edit the rotating banner (it’s actually called “image slider”) used on the homepage, don’t sweat, it’s easy:
Editing the rotating banner (image slider) in Prestashop 1.6:
1) Start by logging in to the administration backend
2) Click on the word “Modules” under the topic “Module” in the left had links pane.
3) Click in the search field (denoted with the magnifying glass icon) and search for “image” as shown. You will be presented with more than one option, the one you want is “Image slider for your homepage”
4) Click configure in order to edit/customise the image slider