[Resolved] Change currency on Gift Certificate template [SOLVED]

UPDATE: When I actually tested the coupon, it changed the USD to € which is perfect. It just didn't show on the backend.
SOLVED.

Hi there,

How do I change the 'value' currency on the gift certificate from USD to EUR for example?
I could get around this by adding it to the image file, but the 'value' field is compulsory.

Thanks for quickly reply