thanks a lot Cristian!! as always.
i looked at the site and i see that by default paypal account optional is already optional already (ON already)
perhaps its my english that havent explain my question well
i am actually want to achieve what the video explains below
start at time 7:30
1) pop up a browser and users not leaving the site and show paypal page
2) the payment page goes directly to fill the credit card info, the option for paypal login page is gone