NOTE: Office 365 app user should create additional columns through the regular SharePoint column management page (List Settings), not through the app.

Connected Field can create and manage additional columns from the same source list. These columns look up data from the same item as the parent Connected Field and are filled and updated automatically. You create additional columns from the parent Connected Field settings and you also remove the column from the same place by checking and unchecking columns in the Advanced section of the Connected Field column.