Display Featured Image & Custom Size - Genesis

functions.php

// Register a custom image size for Singular Featured images
 
//Choose custom image size and remember to Regenerate Thumbnails
add_image_size( 'singular-featured-thumb', 768, 450, true ); 
 
//Hook to add image before entry content
add_action( 'genesis_before_entry_content', 'tm_display_featured_image' );
 
//Function to display image
function tm_display_featured_image() {
    if ( ! is_singular( array( 'post', 'page' ) ) ) {
        return; //ends function if not singular post or page
    }
    if ( ! has_post_thumbnail() ) {
        return; //ends function if no thumbnail chosen
    }
    // Display featured image above content
    echo '<div class="singular-featured-image">';
        genesis_image( array( 'size' => 'singular-featured-thumb' ) );
    echo '</div>';
}