Hello, Muhammad Fadil Khodadin

I hope you're doing well.

Yes, it is possible to change the paper format for printing invoices or any reports in Odoo to A5 or any other desired format.

Here’s a guide on how you can achieve this:

Modify or Add Paper Format:

- Settings → Technical → Reports → Paper Formats.

- Create a new paper format with the dimensions for A5 or edit the existing one.

- Set the paper size to A5 in the Paper Size field.

- Adjust the margins as needed for your requirements.

Changing the Paper Format for Report:

- Settings → Technical → Reports.

- In the report, Select the newly created or updated A5 paper format from the paper format field.

I hope this helps!

Thanks & Regards,

Email:  odoo@aktivsoftware.com           

Skype: kalpeshmaheshwari