Thumbnails in the posts are gone

the theme by default did not have featured image ready on single posts.
open single.php and add this near the_content()

<?php if ( has_post_thumbnail() ) : ?>
	<a href="<?php the_permalink(); ?>" title="<?php the_title_attribute(); ?>">
	<?php the_post_thumbnail(); ?>
	</a>
<?php endif; ?>

Thanks, Richie! It works! But the image don’t fill de space in same cases, when it’s smaller then main column… how can I make the picture fill the space, even, by strecht ou crop tools? It is possible?

maybe this

<?php if ( has_post_thumbnail() ) : ?>
	<a href="<?php the_permalink(); ?>" title="<?php the_title_attribute(); ?>">
	<?php the_post_thumbnail('large'); ?>
	</a>
<?php endif; ?>

Hi Richie… with this new code, i didn′t see differences for the firts code… but the important is the article is showing thumbnail! Thanks a lot!