When your payment includes DRP allotments, these are made automatically on the Payment date. In the Payment detail view, click on the blue number next to the DRP field to take you to the Dividend reinvestment plan detail view, which shows a list of shares issued to investors via the DRP.
Because DRP payments are made automatically on Payment date there is no need to change any payment statuses on the Dividend reinvestment plan detail view.
In the Dividend Reinvestment Plan detail view, on the payment date, the Send unsent statements and mark as sent button will turn green and a link to Statements unsent will be visible.
One exception to this is where an investor has selected the Partial DRP option. In this case, dividend statements will only be available after the cash portion of the dividend has been set to Paid.