Table of Contents
1, Go to Modules -> Module Manager.
2, Search Cross-selling and click on configure button.
3, Fill required fields.
PRESTASHOP 1.7.X – HOW TO MANAGE “PRODUCTS IN THE SAME CATEGORY” MODULE #
PRESTASHOP 1.7.X – HOW TO CREATE A RELATED PRODUCT #
https://www.templatetrip.com/help/prestashop-1-7-x-how-to-create-a-related-product/