Tutorial: How to add a change List and Map
From your Shopify admin, go to Settings > Checkout.
In the Configurations section, click Customize next to the checkout configuration that you want to customize.
In the checkout and accounts editor, select the Thank you page and then click the sections icon to access the Sections sidebar.
Click on Packeta - PP Selection
Set "Selector - Use Map and List" to True
Click Save.
Button for Select from map will be automatically enabled, when you add the Google Maps API key to the Shipping settings in our app. How to add and register Google Maps API key