Comment field on Checkout

I'm trying to make a comment field on the checkout page. In a prior topic someone asked this and was told to select

I've done this on my site using business edition customers can add comments at checkout.
I created a custom field in Display > custom field and create a new field
Select the "order" table and field type "text" or Text box" and check boxes to show on front end and back end.
New field will be there on checkout.

*********My problem is that when I make a custom field and go to the drop down field "order" is not there (only address, user, product, category) ? How do I get "order to appear so I can select it?

Hi,

You seem to have the "essential" version of HikaShop, and it's only available in the "business" one.