Once the extension is installed successfully, go to Stores > Configuration setting to configure the extension.
City and Region Manager: Enable or disable extension from here. Set the extension to enable to use of the features of the extension.
ZipCode Optional: Set Yes if the admin wants to make the Zipcode field optional for customers.
Note – You also need to perform general configuration settings along with extension configuration to make the Zipcode optional.
- From Magento Admin, go to Stores > Settings > Configuration
- Expand the General tab and select General.
- Look into the Country Options
Zip/Postal is Optional For – Select the countries that will be eligible for the Zipcode optional functionality.
At last, click Save Config.