printable content / excluded content

<style>
  @media print {
    .noprint { display: none; }
  }
</style>

<div class="noprint">
...
</div>

But we need to use

$this->dompdfOptions->setDefaultMediaType('print'); into /modules/contrib/entity_print/src/Plugin/EntityPrint/PrintEngine/DomPdf.php

use css to hide any HTML containers
entity print allows to include extra css, so @media doesn't have to be set to print