How to Add Featured Image to Single Post and Page in Genesis

Place this piece of code in your theme’s functions.php to see the action.

// Register a custom image size for Singular Post and Page Featured images
add_image_size( 'singular-featured-thumb', 880, 450, true ); // Hard Crop Mode

//  Display featured image above content
add_action( 'genesis_before_entry', 'display_featured_image' );
function display_featured_image() {
    if ( ! is_singular( array( 'post', 'page' ) ) ) {
        return;
    }
    if ( ! has_post_thumbnail() ) {
        return;
    }
    
    // Array the image in class
    echo '<div class="singular-featured-img mobile-hide">';
        genesis_image( array( 'size' => 'singular-featured-thumb' ) );
    echo '</div>';
}

After implementation of this code snippet you’ll be need to resize featured image, use Regenerate Thumbnails plugin.