I want to change a form from purchase order to PayPal.

How do I delete purchase order to add PayPal? I can't see how to do it?

Simply delete it, and add the PayPal integration, just make sure to keep the products to avoid setting them up again, example:

Let us know if you need more help, we will be glad to assist you.

Hi. Thanks for replying. I managed to add it to a copied form but I can't delete it on the form I wanted to without loosing all the items for sale. I could however do it with the duplicated form. I'd ideally like to do it on the original so I don't need to change the form address as I've already sent it out to students and have put it on my website/Facebook and fiend etc.
Many thanks
Nina Jones
Academy Arts Theatre School,
01245-422595
...

You won't lose the products you have setup, the integration will keep them, you just have to specify the popup message. Or do you mean losing the already collected data?