Hi @headmetal,
Please install and activate the child theme and login through FTP then edit the functions.php then add this code:
function add_image_on_posts() {
if( is_single() ) :
echo '<div class="single-post-image">';
echo '<img src="URL_OF_THE_IMAGE_FILE" alt="">';
echo '</div>';
endif;
}
add_action( 'x_after_masthead_end', 'add_image_on_posts' );
add_action( 'x_before_colophon_begin', 'add_image_on_posts' );
Please change URL_OF_THE_IMAGE_FILE that is in the code above to the url of the image file, then add this code in X > Theme Options > CSS:
.single-post-image {
width: 100%:
margin-top: 28px;
text-align: center;
}
Kindly note that since this is a custom code that changes the default behavior/display of the theme, you will be responsible to maintain or update the code in case you require further changes or if the code stops working in future updates. If you are uncertain how to proceed, it would be best to get in touch with a developer.
Hope this helps.