On your payment pages (online or otherwise), Payment Center displays the types of credit cards that you support (i.e. Visa, MasterCard, etc.), as shown by the screenshots below:
To set your supported credit cards, go to Payment Center Settings tab and select your processor. Under Credit Card Types, select the cards you support:
Note that with some processors, you have to do the same settings (normally done by logging into your account with them), so ensure that what you set with your processor corresponds to what you set here.
If you don’t see the Credit Card Types section above, please create a new section on your layout and add the Visualforce Page CardTypeSelector, as shown below:
This feature is available in the November 2013 release.