All Gift Vouchers created can be found on the Gift Vouchers Screen.
Tap on each voucher directly and you'll be taken to the View Voucher Screen where you can see all your voucher sales.
On the far right side in the ACTIONS column, there is a DOWNLOAD button relating to each Gift voucher - press this once to download your Gift Voucher
To print this out you will first need to Download it to your computer and then you'll be able to print it