Change my payment option in form

I am using strip on my jotform but i would like to swith and use paypal pro how tdo i delete strip and add paypal?

You can easily do that by clicking the "x" button then add the "Paypal Pro" integration under the "Payment Tools" section.

Here's a screencast that you can follow:

The guides below might also help you:

http://www.jotform.com/help/165-Setting-Up-Your-First-Order-Form 

http://www.jotform.com/help/323-Mastering-Payment-Form-Integrations-with-JotForm 

Do let us know if you need more information on this.

Thanks.