# Configuration
Once you have successfully installed the extension, go to **Stores -> Configuration -> Sales -> Payment Methods -> HDFC Payment Gateway** to configure the extension for use. Here you can find various settings for the HDFC Payment Gateway payment method to configure the extension for use.
* **Enabled -** Set Yes to enable HDFC Payment Gateway extension.
* **Title -** Enter the payment method title to show in the front end.
* **Transaction Mode -** Select transaction mode for HDFC Payment.
* **Merchant ID -** Enter the Merchant ID provided while registering with HDFC Payment.
* **Client ID -** Enter the Client ID provided while registering with HDFC Payment.
* **Response Key -** Enter the Response Key provided while registering with HDFC Payment.
* **API Key -** Enter the API Key provided while registering with HDFC Payment.
* **Payment from Applicable Countries -** Select all or specific countries option to allow HDFC payments.
* **Payment from Specific Countries -** If selected specific countries option is selected in the above field, select countries from here to allow HDFC payments.
**NOTE -** To get Merchant ID, Client ID, Response Key and API Key, you need to request the HDFC support team through email. Send mail to -
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