I created a Nintex form on a SharePoint 2016 list. I need the following functionality,

User clicks on a button. The button is called, "Copy."

On the button click, certain fields get hidden.

On the button click, certain fields value change (based on some criteria).

After that, the user can save the form by clicking on the save button.

What is the easiest way to achieve that? I realize that if I kick off a workflow (when the user clicks on the button), I can achieve what I want (hide fields, update values). But then the form will close. I don't want the form to close. The form should stay open until the user clicks on save or cancel.

Thanks a bunch.

Mayank