Add default fields to a product
I am trying to create multiple product types using content type. I find that some of the fields, for example, product weight, brand, should be considered as the generic fields, and put them into all the new created content types. I can do that one by one by adding the fields, but if there is 20 content types, then I need to add those fields 20 times. Just wanderring if there is anyway to make those fields default fields when creating a content type.