Hi,

To make any customization in the report layout striped you can inherit the template "web.external_layout_striped" and if you want to add the customization only for the invoice module please try with adding a condition "t-if="o._name == 'account.move'""

example

<template id="inherit_external_layout_striped"
inherit_id="web.external_layout_striped">

             <div t-if=o._name == 'account.move'>

            # Your custom code

            </div>
<xpath expr="//t[@t-call='web.external_layout_striped']" position="replace">

        </xpath>

</template>

Hope it helps

Hello Jort, first thanks for your answer, 

Can't i do that by inheriting the web.external_layout_striped view? I prefer to use this model for all reports (especially the grids), because as I understand your post on your blog, we create another custom layout, is it not possible to inherit an existant layout? 

Sincerly yours

The items displayed on the invoice are specified in the report_invoice_document​ template from the account module: https://github.com/odoo/odoo/blob/16.0/addons/account/views/report_invoice.xml. So you would need to extend this template to add your modifications. See this post: https://www.odoo.com/forum/help-1/add-bank-account-number-under-company-details-of-a-invoice-odoo-16-community-edition-236599#answer-236603

I hope this helps!