Vendor/phpspreadsheet/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Writer/Xlsx/Chart.php
private function writePrintSettings($objWriter)
    {
        $objWriter->startElement('c:printSettings');

        $objWriter->startElement('c:headerFooter');
        $objWriter->endElement();

        $objWriter->startElement('c:pageMargins');
        $objWriter->writeAttribute('footer', 0.3);
        $objWriter->writeAttribute('header', 0.3);
        $objWriter->writeAttribute('r', 0.7);
        $objWriter->writeAttribute('l', 0.7);
        $objWriter->writeAttribute('t', 0.75);
        $objWriter->writeAttribute('b', 0.75);
        $objWriter->endElement();

        $objWriter->startElement('c:pageSetup');
        $objWriter->writeAttribute('orientation', 'portrait');
        $objWriter->endElement();

        $objWriter->endElement();
    }
private function writePrintSettings($objWriter)
    {
        $objWriter->startElement('c:printSettings');

        $objWriter->startElement('c:headerFooter');
        $objWriter->endElement();

        $objWriter->startElement('c:pageMargins');
        $objWriter->writeAttribute('footer', 0.3);
        $objWriter->writeAttribute('header', 0.3);
        $objWriter->writeAttribute('r', 0.7);
        $objWriter->writeAttribute('l', 0.7);
        $objWriter->writeAttribute('t', 0.75);
        $objWriter->writeAttribute('b', 0.75);
        $objWriter->endElement();

        $objWriter->startElement('c:pageSetup');
        $objWriter->writeAttribute('orientation', 'portrait');
        $objWriter->endElement();

        $objWriter->endElement();
    }
Write Printer Settings.

@param XMLWriter $objWriter XML Writer