How can I include a comma to the payment field?

and also to include a comma if the number is 1,000 or more.

I think that I have to click on the paint roller and then CSS, but then....?

Unfortunately, there is no option to include a comma to the total payment field. However, we can hide the total payment field and replace it with a form calculation widget that will show the total with a comma.

If that is okay with you, let us know so we can provide a guide on how to achieve it. Thank you.