[solved]extra input field in Orders checkout ?

[pedes]

I use the Orders module to order selected products and then send the order email.

This works perfectly, but I would have liked an extra input field so that the customer can (eg under completing his data) put in a delivery date.
This date should be taken through the order process and get also on the email that is sent.

There is no payment function, just selection of products and handling of the order, with list and email.

I have one and tried another, but with the breaking of the site as a result.
Anyone have an idea?

Thank you very much.

edit: used the field from the second address line