title: Add watermark on pdf, from google app script
body: <p>I'm creating a pdf from google app script and i'm saving that in google drive, before crating pdf, i want to add a watermark, "TEAM MYNAME" and then finally save it to drive.</p>
  
  <p>function to create a pdf and save it in g-drive</p>
  
  <pre><code>function savePDF() {
  
    var content = '&lt;span style="font-size: 20px;"&gt;Hello, this is a sample pdf&lt;/span&gt;';
    var htmlBody = HtmlService.createHtmlOutput(content).getContent();
  
    var blob = Utilities.newBlob(htmlBody, 'text/html').getAs('application/pdf').setName('digest.pdf');
    DriveApp.createFile(blob);
  
  }
  </code></pre>
  
  <p>this is working, but i want to add a watermark. can any one help me </p>