Step one: Upload the module zip file from the again-Business office Module & Services menu tab. Module Manager location using the add button. Once the effective installation module menu, the link will show up during the left menu or leading menu within the again-Place of work much more location. - https://www.presta-addons-modules.com/en/free-modules/prestashop-preloader-page-loading-image-page-loading-animation-preloading-screen-loading-page.html