Where To Edit Invoice Fields

[pro-safety]

I can not figure out why I cant find this. Please could someone assist with where these fields can be edited? I.E when creating an invoice there are some fields I want and some I dont. Also to amend the order.

I must have figured it out at some point but just cant find my way through now?

[Chrunchy]

Setting → Invoice Design ->Product Columns

[pro-safety]

Thats where the search took me for a solution. However the fields are not in these columns as per image here