Custom margin in PDF

At least I found out the following.

PHPRunner generates a json file for each page in a folder pdf.

Open that and add at the end something like

  // a string or { width: number, height: number }
  pageSize: 'A4',

  // by default we use portrait, you can change it to landscape if you wish
  pageOrientation: 'portrait',

  // [left, top, right, bottom] or [horizontal, vertical] or just a number for equal margins
  pageMargins: [ 56, 155, 56, 20 ],

and you can change pageSize and pageMargins.

So, is there a way to change these settings programatically?

But this is only something for the very late deployment, since the json files are overwritten with any change in Designer.