The last tab of the order editor window allows you to repeat the order. For example, if you have to charge a customer a fixed amount per month or per year, Organise will create a new order for you when the time comes, by copying most details from the previous one.
If you would like an item to repeat, check the checkbox and set the drop-down list to week, month or year as appropriate.
When the time comes (ie one week, calendar month or calendar year after the Order date) then Organise will make a duplicate order with a new Order number, new Order date and blank Date paid fields. This assumes that Organise is running at the time. If not, Organise will make the duplicate the next time you start it.
The 'copy now' button immediately makes a one-off copy. This is useful for a one-off repeat order.