In Nintex for Office 365 forms are created using the Nintex Forms for Office 365 app. It allows users to quickly and easily create or customize SharePoint Online lists. You can create forms to capture and submit accurate and current data. The user-friendly design canvas, drag-and-drop controls, and business logic make it easy to customize your forms to suit your needs.
Types of forms: You can create list forms to add items to a SharePoint list or a workflow task form to request and capture user input. For more information, see Types of forms.
Form designers: Different form designers are available and you can access the required form designer based on your requirement. For more information, see Access the Nintex Forms designer.