Adding HTML above blog post featured image on every post

Replies: 0

Is it possible to add HTML above every blog post’s featured image (both past and future posts)? That is under /wordpress/blog-post-title/ and not on this page: /wordpress/blog/. I tried adding my code in single.php:

<?php
/**
 * The Template for displaying all single posts.
 *
 * @package aThemes
 */

get_header();
?>

	<div id="primary" class="content-area">
		<div id="content" class="site-content" role="main">

		<!-- Test 1 -->
		<?php echo "Content here appears above post title"; ?>

		<?php while ( have_posts() ) : the_post(); ?>
		
		<!-- Test 2 -->
		<?php echo "Content here also appears above post title"; ?>
		
			<?php get_template_part( 'content', 'single' ); ?>
			
			<!-- Test 3 -->
			<?php echo "Content here appears at end of post"; ?>
	
			<?php if ( get_theme_mod( 'author_bio' ) != 1 ) : ?>

As indicated by the comments, I have added some code but none of the code goes above the featured image. Is there another theme file where I should be adding the code?