I can not find the option to display custom fields

-- HikaShop version -- : 2.3.5
-- Joomla version -- : 3.4.0
-- PHP version -- : 5.5.41
-- Browser(s) name and version -- : Internet Explorer 11

I am creating a store where I need to put an extra field in the file for each product. Apart from the item code I need to differentiate with a number that comes in a diagram (you can find it in another diagram with the same code but other number)

I tried adding custom fields in the "System-> Display" screen, but to create them does not allow me to select another table (I have only one, and is called "address")

I am trying to find how to put custom fields in the products but can not find a way to display them. I followed the instructions in the help but observe differences between the aid of HikaShop and the version I have installed. I can not find the option to display custom fields as you can see in the two screenshots that I enclose here, Hika and Mine, where you can see the difference.

What can I do? What am I doing bad?

Thanks a lot.

Not sure where you looked, but it's all very clearly described in the documentation: www.hikashop.com/support/support/documen...shop-field-form.html

Right at the beginning, under "Description", it's about the different types of custom fields, and in which HikaShop edition they are available. With the Starter version, there are only "address" fields available, indeed.