How to make Horizontal Cards
If you intend to use your cards horizontally and wish for both sides of the card to be oriented in the same direction in print, you will need to rotate either the front or the back image by 180 degrees. Generally, the easiest way to do this is to rotate the deck back image (if using one).
Another way to imagine this is that the Y axis of the template is where the card will fold to have the images oriented correctly.
Note that your card images must be in portrait format (not landscape) when uploading.