mpdf margin
<?php
$mpdf = new \Mpdf\Mpdf([
'mode' => '',
'format' => 'A4',
'default_font_size' => 0,
'default_font' => '',
'margin_left' => 15,
'margin_right' => 15,
'margin_top' => 16,
'margin_bottom' => 16,
'margin_header' => 9,
'margin_footer' => 9,
'orientation' => 'P',
]);
$mpdf->WriteHTML('Hello World');
// Saves file on the server as 'filename.pdf'
$mpdf->Output('filename.pdf', \Mpdf\Output\Destination::FILE);