Hi,

You can create a custom paper format through the UI or by using code. The page number is already shown in the report by default. To display the printed date, you need to create a custom layout. A Python file is not required, as the report is connected to the model through the report action using the binding ID, which allows you to access all data from that model.

1. Custom Paper Format

Settings-> Technical-> reporting-> Paper Formats.

- Landscape orientation can be set using the Orientation field

- Choose Pro-forma Invoice in the Associated Reports field.

- You can set the top, bottom, left, and right margins as needed.

2. Custom Layout 

Sample custom layout

<template id="report_custom_external_layout">
    <!-- Multicompany -->
    <t t-if="not o and doc">
        <t t-set="o" t-value="doc"/>
    </t>
    <t t-if="o and 'company_id' in o">
        <t t-set="company" t-value="o.company_id"></t>
    </t>
    <t t-if="not o or not 'company_id' in o">
        <t t-set="company" t-value="res_company"></t>
    </t>
    <div class="header">
        <div class="row">
            <img t-if="company.custom_report_header"
                 t-att-src="image_data_uri(company.custom_report_header)"
                 alt="Logo" width="100%"/>
        </div>
    </div>
    <div class="footer o_standard_footer" style="position: relative;">
        <div style="width: 100%;">
            <div class="row"
                 style="display: -webkit-box; display: flex; -webkit-justify-content: space-between; justify-content: space-between; width: 100%;">
                <div class="col-4 text-center" style="font-size: 10px;">
                    <span t-esc="time.strftime('%Y-%m-%d')"/>-
                    <span t-esc="time.strftime('%H:%M')"/>
                </div>
                <div class="col-4 text-center" style="font-size: 10px;">
                    <span>Page</span>
                    <span class="page"/>/
                    <span class="topage"/>
                </div>
            </div>
        </div>
        <div style="width: 100%;">
            <img t-if="company.custom_report_footer"
                 t-att-src="image_data_uri(company.custom_report_footer)"
                 alt="Logo" width="100%"/>
        </div>
    </div>
    <div class="article o_report_layout_standard"
         t-att-data-oe-model="o and o._name"
         t-att-data-oe-id="o and o.id"
         t-att-data-oe-lang="o and o.env.context.get('lang')">
        <t t-raw="0"/>
    </div>
</template>

<div class="col-4 text-center" style="font-size: 10px;">

                    <span t-esc="time.strftime('%Y-%m-%d')"/>-

                    <span t-esc="time.strftime('%H:%M')"/>

                </div>

This code indicates - printed date and time

3. Inherit Pro-Forma Invoice 

    <template id="sale_order_report_saleorder_document"
              inherit_id="sale.report_saleorder_document">
        <xpath expr="//t[@t-call='web.external_layout']" position="replace">
            <t t-call="module_name.report_custom_external_layout">
<!--                Details-->
            </t>
        </xpath>
    </template>

Hope it helps.

Hello Kalana Piyumantha,

Please refer to the following documentation and YouTube playlist to understand how to work with PDF reports in Odoo:

 https://www.odoo.com/documentation/18.0/developer/tutorials/pdf_reports.html

 https://www.youtube.com/playlist?list=PLqRRLx0cl0hqclwqsT4cm8vkIU4NAj3uA

If you have any questions, please feel free to reach out to me. I'm happy to help!

Thanks & Regards,

Email:  odoo@aktivsoftware.com           

Skype: kalpeshmaheshwari