I want to have two different view in a nintex form?
In each view I want to have a Button, when click in each of them have a different action?
For example I want to push a button for reset the field value and the other one send an email.
But I dont have to see both Buttons in the same view.
If you have 2 buttons on the same form, you can add a rule to each button to hide based on a condition. I am not sure what your criteria would be to show/hide the button, but it could be something like a status field on the item or even the value of a variable within a form.
You can also simulate different views on a Nintex form by adding controls to a panel and setting a show/hide rule on the panel.
Currently the ability to add multiple views to a Nintex O365 Form or Nintex on-prem Form is not available.
In that case I would recommend passing a parameter to the form in the query string and using that value (stored in a variable or in a control) to show/hide controls on the form.
See this thread for more information on how to do this.