how to print a blank PDF of the site

I'm afraid that I couldn't fully understand your question. Could you please elaborate a little about what do you mean by site (which site), and what do you mean by printing a blank PDF of it?

If you are asking about creating a PDF version of your form, so that your users can fill it out and send it to you, you can do that by following this guide:

http://www.jotform.com/help/212-How-to-Create-a-PDF-Form

If this is not what you were asking about, please do let us know in a little more detail about your query, and we will be happy to assist.