<data priority="60">
    <xpath expr="//t[@t-set='show_header']" position="replace">
        <t t-set="show_header" t-value="False" />
    </xpath>
    <xpath expr="//t[@t-set='show_footer']" position="replace">
        <t t-set="show_footer" t-value="False" />
    </xpath>
</data>
