Magento Open Source, 1.9.x

PayPal Payments Pro

PayPal Payments Pro brings you all the benefits of a merchant account and payment gateway in one, plus the ability to create your own, fully customized checkout experience. PayPal Express Checkout is automatically enabled with PayPal Payments Pro, so you can tap into more than 110 million active PayPal users.

For merchants outside the US, this method is called “PayPal Website Payments Pro.”

You can have two PayPal solutions active at the same time: PayPal Express Checkout, plus any one of the All-In-One solutions. If you change payment solutions, the one used previously is automatically disabled.

Requirements
Setting Up PayPal Payments Pro