https://www.drupal.org/docs/contributed-modules/entity-print/usage

I need to create a PDF with a custom style for issuing training certificates in courses. This PDF will be printed and has a different style than the rest of my website's theme. I created a content-type "certificates".

After installing the module, create a new "view mode" called "PDF"
It is in the path "/admin/structure/display-modes/view"