How to change currency in the payment field?

how can i change the currency if i want to add a product purchase option?

Hi,

Thank you for contacting us. 

To clarify, you want to change the currency on the payment settings on your form correct? I have checked your form and it seems you are using the Paypal Checkout Integration. You can change the  currency on the payment settings:

However, if you are referring to change the currency on a specific product option, unfortunately, it's not possible. As a workaround, you can make multiple payment options by creating a different form with a different currency, then embed it on the main form. Here's a detailed guide: How-to-Create-a-Basic-Multiple-Payment-Form

Let us know if you need further assistance or if you are referring to a different query.