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Wizards make it easier to configure what happens to the data when a user submits your flow and what the users see after submitting the flow. The wizards are accessible from the flow designer toolbar via the one button labeled Form Action and another labeled Doc Action. The action settings are summarized in the flow properties flow info tab.
When you drag/drop a form into a flow the form's Doc Action does not get carried along. A flow's Doc Action happens once all steps of the flow have been performed and not between individual steps. In concept even though a flow is multiple steps, a flow is in the end one single form submission.