Hi Mihir Y‌, if you look in the new Responsive Forms for SharePoint 2013 On-Prem Designer, there's no more layout feature like in Classic Form Designer as one form created will cover all layout even for Nintex Mobile Apps.

You mean to say, Nintex forms supports responsive design fully in on-prem of SP2013?

Hi Mihir,

yes, with latest release of Nintex Forms, when you design a form you can choose between Classic Form (where you can create several layouts in order to match several device type) or Responsive Form (where responsive design is made by Nintex and you have only to put properly the controls inside the form)

Giacomo

Hi im on SP2013 on-prem also, and interested to upgrade into responsive form. Is there any tutorial or user guide on how to install this?

Hi Mandy,

in order to have Responsive Forms also on SP2013 on-prem, you have to update your Nintex Forms solution with latest version.

After that, when you create a new form on a list/library you'll be prompt if you want Classic Form or Responsive Form, then you can follow some quick advice on how responsive designer works in the post that has been published when that functionality has been released in O365:  

I think it's one good start point to understand how new responsive forms work