@herbert So far we managed it our self. We use the Professional Template App which can be purchased from the odoo store. It made some things much easier and nicer. I added some field to the overview in invoices just by copy and modifying the others...

For example I added a field for the EORI number as well as for the DVRNumber which is an Austrian thing. Having said this. I’m not a programmer... with some basic knowledge it is possible.

Example:

<div t-if="doc.client_order_ref" t-attf-style="{{div_style}}">

<strong style="white-space:nowrap;">Client Reference:</strong>

<span t-field="doc.client_order_ref"/>

</div>

<div t-attf-style="{{div_style}}">

<strong style="white-space:nowrap;">EORI#:</strong>ATEXxxxxxxxxxxxx

</div>

<div t-attf-style="{{div_style}}">

<strong style="white-space:nowrap;">DVR#:</strong>Xxxxxxx

</div>

</div>

As you can see, I copied the client reference part and just made my adjustments.

This is not prefect as you have to update manually after every update of the app the lines of code added. It works like a charm while the template will arrange it self.

Hope that helps...