Thanks for your help. However, CF7 is available at contact-us page. I was looking for the form they are using while creating documents. How it is working:
When we click on create document, it shows us a form on the left and previewer on the right. As soon as we fill something in the form, it shows us on the right previewer.
I was bit confused as I am new in wordpress. How they have developed it and synchronized form as well as previewer together.
Thanks a lot once again.