Hi
I managed to add 2 new fields to my products (Size A and Size B)
I got 2 categories Automotive and Constructions. Category Automotive has both sizes A and B. Category Constructions has only size B. How can I switch off column 'Size A' (field is blank) to be not visible for category Constructions but it should be visible when entering category Automotive where field Size A should be on.

I manage to sort it in product's details and works fine but can't sort it in products listing.

Many Thanks.