I searched the documentation but I didn’t find these instructions.
In the single product settings, there are 2 options “View related products” and “View upsell products”
I noticed that the related products are displayed on the product page, but no upsell products are displayed.
If I disable or enable the “View upsell products” option, nothing happens.
Anyway:
* How do I get upsell products to be displayed?
* How do I define which products will be displayed?
* Can I assign upsell products or even upsell product categories to specific products?
It is not clear how this works.