Related product list on the product detail page


(plus) On the admin sidebar, navigate to Catalog > Products. 

(plus) Go to Products page, find the product need editing, click Edit under the Action column.

(plus) On the product detail page, expand the Related Products, Up-Sells, and Cross-Sells section, then add the related products under Related Products section.

(plus) Admin can edit the available related product list by rearranging the product position or removing products.