Comment 'UPDATE - in the &quo...' to '[Solved] Poll in a Post - How to set custom CSS to get the iframe to 100% height?'
  • UPDATE - in the "View post" page is better use this RAW block with the following content:

    <script lang="javascript">

      var oSelect = $(".bx-base-text-entity-content iframe").first();

      oSelect.css("height", "400px");

    </script>

    It should be placed in the last position of other blocks.