Demonstration of the args for genesis_get_image

functions.php

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

/**
 * Demonstration of the args for genesis_get_image
 *
 * @author Reasons to Use Genesis
 * @link http://reasonstousegenesis.com/featured-image/
 */
add_action( 'genesis_entry_content', 'rtug_featured_image_args' );
function rtug_featured_image_args() {

	$image = genesis_get_image( array(
		'post_id'  => 300,
		'format'   => 'html',
		'size'     => array( 250, 250 ),
		'attr'     => array( 'class' => 'rtug', 'id' => 'rtug' ),
		'fallback' => array( 'html' => '<img src="rtug.jpg">', 'url' => 'http://reasonstousegenesis.com/rtug.jpg' ),
		'num'      => 1,
		'context'  => 'rtug'
	) );

	if ( $image ) {
		printf( '<a href="%s" rel="bookmark">%s</a>', get_permalink(), $image );
	}

}