Hi,
At the beginning of our documentation page on custom fields we explain the uses of the different "tables" of custom fields:
www.hikashop.com/support/documentation/4...orm.html#description
There, you can read this for custom fields of the table "product":
With the product custom fields (both essential and business edition only), you will be able to personalize the information for your products. Your potential customers will be able to see those on the product page. Also, with the filtering module, which will be available in a later release, your customers will be able to filter your products using filters based on those custom fields.
So, the goal of these custom fields, is to add extra information on the product details page on the frontend, which can be different for each product. Supposing you do this, and you get to see on the product details page the custom field value entered in the custom field of a product in the backend, then activating the "invoice" display setting will add an extra column to the products listing of the invoice, with the value from the custom field for that product if it is part of the products purchased for the order of the invoice.
If your goal is to add a generic text to the invoices (which is the same for all of them), then I don't think a custom field is appropriate, and a product custom field even less.
In your case, I think the best is to edit the order / invoice view (for your backend template), and the order / show view (for your frontend template), via the menu Display>Views of HikaShop. There, near the end, you can directly add your text.
For example, just after the last
of these views, you could add the line:
<h3>Gemäß § 19 UStG wird keine Umsatzsteuer berechnet.</h3>
You can read more about view files edition here:
www.hikashop.com/support/documentation/1...-display.html#layout