Shows how to enable showing heading fields in the Participants Database admin edit participant page

pdb-admin-show-heading.php

<?php
/**
 * Plugin Name: PDB Show Heading Fields in Admin
 * Description: enabled showing the heading type field on the admin edit participant page
 */

add_filter( 'pdb-omit_backend_edit_form_element_type', 'xnau_enable_heading_field_display' );

/**
 * remove the heading field from the backend omit types array
 * 
 * @param type $omit_types
 * @return type
 */
function xnau_enable_heading_field_display( $omit_types )
{
  unset( $omit_types[ array_search( 'heading', $omit_types ) ] );
  
  return $omit_types;
}