How can I add a reset button when using the Settings API?

$slider_options = get_option( \'nextslider_options\' );

 /* Define the array of defaults */ 
$defaults = array(
    \'width\'             => 0,
    \'height\'            => 0,
    \'effect\'            => \'fade\',
    \'bullets\'           => 0,
    \'arrows\'            => 0,
    \'slidelength\'       => 4000,
    \'animationlength\'   => 600
);

$slider_options = wp_parse_args( $slider_options, $defaults );