Select the card you want to make your favorite on the wallet screen, click Card Settings, click  Set As Favorite Card, and then follow the step-by-step instructions for the Set As Favorite Card option.

Note: The heart in the top right corner of a card on your wallet screen indicates your favorite card. Upon logging in, your favorite card will always be the first card on your Wallet screen, and any future Peer to Peer transfers will be loaded onto this card.