To define two different paper formats for a report in Odoo, you can override the get_report_paperformat method in your custom report template. Here's an example of how you can achieve this:

from odoo import models

class CustomReport(models.AbstractModel):
    _name = 'report.custom_module.custom_report_template'

    def get_report_paperformat(self, docids, data=None):
        if condition:  # Define your condition to determine the paper format
            return self.env.ref('report.paperformat_custom_format').sudo()
        else:
            return self.env.ref('report.paperformat_custom_format2').sudo()

In this example, we have a custom report template defined in the module custom_module with the report XML ID custom_report_template. We override the get_report_paperformat method to dynamically select the appropriate paper format based on a condition.

the page orientation 

Hi,

In Odoo's QWeb reports, the page orientation (portrait or landscape) is typically set at the report level and applies to the entire report. However, you can achieve different page orientations for different sections within the report by creating separate report templates for each section.

Thanks