google map zoom button is required

Hi Guys,

I am using extension for google map like




$this->widget('application.extensions.gmap.GMap', array(

					                                'id' => 'promo-gmap',//id of the <div> container created

					                           // 'key' => 'ABQIAAAAzwSWw_J0BxY3Lkj7Roih8RSdFL7ax7b00OEW2TvwO7gn_NP0EBREW3RyoJVNvN3nB_Gb82wdAPMcKw', //goole API key, should be obtained for each site,it's free

					                              'key' => 'ABQIAAAAy0Gi_LqrKLkuYCnYI8vhOxRnPx7L5RMwoxpaB_kzU8Zhw8hRdxQ0WjDfonEDTOh638DRgQ6igB0ePg', //goole API key, should be obtained for each site,it's free

					                                'label' => $model->tblAdvertiserIdtblAdvertiser->avd_display_name, //text written in the text bubble

					                                'address' => array(

					                                    'address' => $model->tblAdvertiserIdtblAdvertiser->adv_address_1,//address of the place

					                                    'city' => $model->tblAdvertiserIdtblAdvertiser->adv_place, //city

					                                    //'state' => 'CA'//state

					                                    'zip'=> $model->tblAdvertiserIdtblAdvertiser->adv_postcode,

					                                    )

					                            ));

I want zoom-in out button in map .Please tell how to add this ASAP.ITS urgent???

THNAKS A LOT