Altering Layouts (No Sidebar, Left or Right Sidebar)

/**
 * Alter your post layouts
 *
 * Replace is_singular( 'post' ) by the function where you want to alter the layout
 * @return full-width, full-screen, left-sidebar or right-sidebar
 *
 */
function my_post_layout_class( $class ) {

	// Alter your layout
	if ( is_singular( 'post' ) ) {
		$class = 'full-width';
	}

	// Return correct class
	return $class;

}
add_filter( 'ocean_post_layout_class', 'my_post_layout_class', 20 );

All PHP snippets should be added via a child theme's functions.php file.