add align-wide

functions.php

@@ -15,6 +15,7 @@ function dw_setup() {
 	set_post_thumbnail_size( 150, 150, true );
 	add_image_size( 'post-large', 770, 577, true );
 	add_image_size( 'studio', 400, 300, true );
+	add_theme_support( 'align-wide' );
 }
 endif; 
 add_action( 'after_setup_theme', 'dw_setup' );