Start a Workflow Manually in SharePoint

From Nintex Automation (5.7) onwards there are two different apps for SharePoint. The legacy Nintex K2 for SharePoint: used for SharePoint on-premises and upgraded environments for SharePoint Online, and Nintex Automation for SharePoint: used on new installations for SharePoint Online.

You can manually start a workflow from an item in the SharePoint list or library associated with the workflow of the application.