Dear Costin,
thank you for your question.
irrespective of the software you are using, you are alsways printing with the standard OKI driver. The A4 pro series has no transparency setting. The best setting you should use is film. With this setting we ensure that your A-Foil is going through your printer without any problems. If you have problems in the transfer later on, this has something to do with your heat press or your handling of the foil.
