How do I integrate with Authorize.net?

I would like to create an order form with clients able to make a payment when they place the order. My preferred method of accepting payments is Authroize.net, but the only Payment option I have is Paypal when I look at those Payment options under Add a Form Element section. Do I have to integrate with Authorize.net first. or...? Can you tell me where to go to configure it?  

I have checked your form and found that, you have integrated Paypal already to your form.

Please keep in mind that, you are allowed to add one payment processor in your form. Since you have added Paypal to your form, you are not able to add Authorize.Net to your form.

I prefer you to remove the Paypal first and then add Authorize.Net, since you are inclined to use that.

You can also check these links to know more about adding payment option to your form:

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

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

If you have any further query, please let us know.