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You won't see any forms or flow the first time you use Live Forms , but as you soon as you create some you'll see them here in their respective location either in the Forms tab for forms and the Flows tab for flows.
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When you delete a form, flow or application by clicking the 
icon the form, the flow or application (and in the case of a deleted application, all the application's forms and flows) is permanently removed and cannot be restored. The delete operation also deletes all submissions from Live Forms's Li; submission repository and any saved in process form instances and pending workflow tasks.
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