Use this filter to change the marker icon on the delivery area map.

add_filter('wdap_map_icon','wdap_map_icon_url');
function wdap_map_icon_url($url){
//Provide url of your custom map icon
$url = 'http://www.yourwebsite.com/your-icon-file.png';
return $url;
}

Use this placeholder to change placeholder of zipcode text field on woocommerce pages on delivery area form only.

add_filter('wdap_provide_zipcode_placeholder','wdap_zipcode_placeholder_on_woopages');
function wdap_zipcode_placeholder_on_woopages($placeholder){
//change placehoder text
$placeholder = 'Your Custom Placeholder Text Here';
return $placeholder;
}

Change heading of product availability tab on product detail page.

add_filter('wdap_pa_tab_heading','wdap_product_availability_tab');
function wdap_product_availability_tab( $heading ){
//Change Heading Of Product Availability Tab
$heading = 'Your Custom Product Availability Tab Heading Here';
return $heading;
}

Use this filter to change text of place order button on checkout page in case of order restriction enabled from backend.

add_filter('wdap_change_translation_order_button_text','wdap_place_order_button_checkout');
function wdap_place_order_button_checkout($label){
//Change Button Label
$label = 'Your Custom Button Label';
return $label;
}

Use this filter to change heading about zip code listing in product availability tab on the product page.

add_filter('wdap_zipcode_listing_heading','wdap_product_availability_desc');
function wdap_product_availability_desc($heading){
//Customise description
$description = 'Your Custom heading About Markers On Map Goes Here';
return $heading;
}

Use this filter to hide unwanted markers for any country by simply passing their short name.

add_filter('wdap_exclude_countries','wdap_exclude_countries');
function wdap_exclude_countries((array)$countries){
//Add shortnames of countries in array dynamically
// For eg. if you do not want to check user provided zipcode for any reason in singapore.
// $countries[] = 'SG';
// See country list shortname from here : //http://creatingawebstore.com/woocommerce-country-codes-and-state-codes-list.html
return $countries;
}

Use this filter if you want to remove the restriction on markers and show markers outside the restricted country also.

add_filter('wdap_enable_marker_country_restrict','wdap_marker_restrict_in_selected_country');
function wdap_marker_restrict_in_selected_country((boolean)$restrict){
//To show all markers having same zipcode in different countries to bypass country restriction
//$restrict = false;
return $restrict;
}

Use this filter to change placeholder text of google autosuggestion text field on the delivery area map.

add_filter('wdap_placeholder_search','wdap_placeholder_search_text_on_map');
function wdap_placeholder_search_text_on_map($placeholder){
//Set Custom Placeholder Text
$placeholder = 'Set Your Custom Placeholder Text Here';
return $placeholder;
}