gistfile1.php

<?php

/* Add the featured image before post title
------------------------------------------------------------ */

add_action( 'genesis_entry_header', 'jm_portfolio_grid',5 );
function jm_portfolio_grid() {

  if ( $image = genesis_get_image( 'format=url&size=portfolio' ) ) {
		printf( '<div class="portfolio-image"><a href="%s" rel="bookmark"><img src="%s" alt="%s" /></a></div>', get_permalink(), $image, the_title_attribute( 'echo=0' ) );

	}

}