This article covers how to set related product relations in Magento.
Setting Related Products
1. Navigate to Catalog -> Products
2. Click edit on the right of the chosen product.
3. Scroll down to Related Products, Up-Sells, and Cross-Sells and choose the Add Related Products.
4. Now select any product that you want to make related to the chosen item.
Non-Commutative Behavior
Making "Product A" related to "Product B" does not make "Product B" related to "Product A".
In order to make 2 products both related to one another, both must be edited separately.
5. Click the orange Add Selected Products button, then save your changes.
