General Settings:
Go to WeltPixel > Ajax Catalog & Infinite Scroll > General Configuration
Enable Ajax Catalog and set this option to [ Yes ].
Ajax Catalog Mode select Ajax Infinite Scroll
Functionality control for Category, Search and Advanced Search Page. When your store is integrated with external search solutions you may need to disable ajax for search pages in order to achieve default magento behaviour and
therefore achieve full compatibility with other solutions.
Use Ajax Catalog on Category Page and set this option to [ Yes ]
Use Ajax Catalog on Search Page and set this option to [ Yes ]
Use Ajax Catalog on Advanced Search Page and set this option to [ Yes ]