Where is the related product field?

-- HikaShop version -- : 2.6.4
-- Joomla version -- : 3.6.3
-- PHP version -- : 7
-- Browser(s) name and version -- : Firefox version whatever

Try as I may, I can't find where the related products are. Look at the screenshot. Nothing to relate a product to.
How do I do that?

Asking the question is solving the question. Looking at the screenshot, I found it. I need new glasses!

Having said that, I can click on the product category plus, but not much happens.

This is all I can find for relating products.

Sorry, no. I type the name, save the product and the name is gone.

Hello,

If you have correctly selected a related product through the "Related products" option and if that option wasn't correctly saved, can you :
- Activate the Joomla debug mode ("Administration->Global configuration->System->Debug System/Language")
- Set the "error reporting" option of the Joomla configuration to "maximum"
- Test it again so that you can see if it display an error message which will help you to understand from what your issue is coming.

Thank you.