trytond-stock_picking_carrier/view/stock_shipment_out_picking_start.xml

<?xml version="1.0"?>
<!-- This file is part of stock_picking_carrier. The COPYRIGHT file at the top level of
this repository contains the full copyright notices and license terms. -->
<data>
    <xpath
        expr="/form/field[@name=&quot;number_packages&quot;]" position="after">
            <label name="carrier"/>
            <field name="carrier"/>
    </xpath>
</data>