at first i wanna say that your theme is very nice. you can call me stuoid now but i found no way to add the function “Extra Content” under my normal product.
i think it will be very easy but it seems that i am too stuoid for it 😀
You can add your Extra Content for the product by adding some elements (images, texts etc.) into it’s description field with Visual Composer. To turn on Visual Composer mode for your products you need to go to Visual Composer -> Role manager -> Post types, choose custom and select “product” to make it work.