Thank you for your answer. The question was not about inserting a custom field, which was already turned on on both forms the Sales order as well as the express pick/pack form under the lists/template.

Please try and you will see that my question is not being solved:

Again: The question is: under the customer/sales order fulfillment when printing pick/pack express form bringing over the custom field  how to. Even though i did edit the form under the template (list/templates) and inserted the field by inserting a check mark to print - when i go to the Customer / Sales order the field is not reflected. More so i renamed the form Express pick/pack under the name and when printing it the form under the Express pick / pack the form is not that same form meaning the changed name is not reflected. In simple words the express pick/pack form that is printed from the Sales order fulfillment can one make changes to it by bringing over the custom field?

Thank you