While you can't change a card to landscape or portrait yourself, our team would be happy to help!
Our templates are usually designed with one orientation, however, if you request Free Designer Assistance after customizing your proof, you can have our designers do this for you on our end. Just personalize your card in its current orientation, filling out all text and adding photos, then select "Request Free Designer Assistance" at the end of the customization process and let us know you'd like the card flipped. Our designers will make that change and send you back a proof for approval.
In most cases there should be no problem changing the orientation, just keep in mind that if a design depends on the card being a certain orientation, we may not be able to rotate the card and keep the design the same. Also, we'll need to keep the card size the same. If you want to change the card size, please see: Changing card size
Since foil cards are stamped with a physical die, some foil designs may be unable to be rotated.
If you have doubts, you can contact us and our team will tell you if the design can be rotated or not.