Insert a piece of extra content after the header and nav

functions.php

<?php
// Paste the code BELOW this line into your child theme functions.

/**
 * Insert a piece of extra content after the header and nav
 *
 * @author Reasons to Use Genesis
 * @link http://reasonstousegenesis.com/genesis-after-header/
 */
add_action( 'genesis_after_header', 'rtug_after_header' );
function rtug_after_header() {

	echo '<p><strong>A piece of extra content after the header and nav</strong></p>';

}