Save it a pdf

I'm not sure if you're referring to generate a PDF of your form or if you're referring to your submissions, but here are some guides that will help you with that. 

If you're looking to generate a PDF fillable form, then these guides will help you: 

How-to-create-a-PDF-form

Fillable-PDF-Everything-you-need-to-know-about-JotForm-Fillable-PDF-Creator

If you're looking to generate PDF reports from your submissions, then you should take a look on this guide:

How-to-Download-Form-Submissions-as-Excel-CSV-PDF

Hope this helps.