Insert a field in a Repeating Section to show the row number of the current row.
A Repeating Section is a container that is wrapped around a series of controls. When the component containing the repeating section is run, these controls are duplicated a specified number of times within the component. In this way, repeating sections can cause the component to appear like a detail form or an invoice page. In addition to controls, you can also add this defined 'Row Number' control inside the repeating section. This will cause each row in the repeating section to be numbered if the Has row number checkbox in the Repeating Section Properties is checked.