How to add watermark Image using MPDF in codeigniter

here is the pdf image

I want to add this kind of background image to my PDF using MPDF. But also i want to reduce the background image opacity.

Answer

Try this-

$mpdf->SetWatermarkImage(
  'assets/dist/img/ExampleLogo1.png',
   0.3,                 // this for transparency
   array(x,y),      // Alignment
);