You can choose one of the following generation format:
- Default PrestaShop – If You want to restore to default
- Number-Day-Month-Year [incrementing number within a day] – Useful if You want to count the number of orders within a day and include it in the reference
- Number-Month-Year [incrementing number within a month] – Useful if You want to count the number of orders within a month and include it in the reference
- Number-Year [incrementing number within a year] – Useful if You want to count the number of orders within a year and include it in the reference
- Random number – If You want numbers instead letters
- Incrementing number – If You want incrementing numbers instead letters