To open the table of all the vouchers generated in one batch, double-click the batch on the Voucher Batches main tab (or select the batch, and then click Open on the bar at the top of the tab).
In the table, you can see records of all of the generated vouchers with information such its unique code, price, validity, the current status of the voucher usage, etc. If the number of records is too high to be displayed clearly, you can filter them by using filters on the left side. Vouchers can be filtered by code, voucher batch, price, etc.
To delete a voucher, select it in the table and click Delete on the bar at the top of the tab. When a voucher is deleted, the code on the voucher becomes invalid.