Type the "+" symbol , at the top left of the screen, then enter the card data.
Each registered card will instantly generate a virtual card through which transactions will be made. Using another card will be done by listing the screen on the left or right.
By registering several bank cards, you can set the card that will be used by default, including in the background mode, by activating the "star" symbol at the top center of the screen with the image of the selected card.