Export Report - set PDF export with the option fit to "Actual Size" as default instead of &

Migrateduser

<p>When I want to export my Report to PDF. In the 'Fit to' radio button option, how do I set the "Actual Size" as default instead of "Auto". Can I know on which folder that I need to go in order to modify it and the name of the page? Thank you in advance.</p>