The configuration in "Sales -> Payment Services -> Payment Template" is not related to the Hosted Tokenization IFrame for credit cards (HTP / Flex Checkout).


It applies to payment methods that would usually cause a redirection to an external payment page (like Paypal). See also the official documentation, section "Configuration - Magento".


Payment Template configuration



To enable or disable the IFrame for credit cards (HTP / Flex Checkout), go to "Sales -> Payment Methods -> Ingenico ePayments Cc -> Enable inline payment for these card types".


If you want to change the styling of the IFrame for credit cards (HTP / Flex Checkout), please see this article.