Related products are meant to be purchased in addition to the item the customer is viewing. Simply click the checkbox of a product to place it in the shopping cart. The placement of the Related Products block varies according to theme and page layout.
To set up related products:
1. In the Product Information panel on the left, click Related Products.
2. Click the Reset Filter button in the upper-right to list all the available products, or use the search filters at the top of each column to find specific products.
3. In the list, select the checkbox in the first column of any product you want to feature as a related product.
Select Related Products
4. When complete, click the Save button.