Once you receive a card its default status will be undefined. From the undefined cards page you can set the status for these cards.
When you load the page, if there are cards in the undefined status, they will be listed in the drop down box. Once you have selected a card it will show the card image, and if you have more than one of the card, it will show the other locations, as well as other locations that you have the deck set to,
To set a location, just click on the required button to change it. Once its set, the page will load the next card that is undefined