You can preview the tickets your customers will receive from within a transaction's details. Go to your Transactions Report, and click an ID number in the first column.

When in the transaction details click the View/Download Tickets link to bring up a PDF copy of the tickets. The ticket will update with every change that is made, so you can keep viewing the same ticket to preview your changes.

If you do not have any transactions yet, simply issue yourself a comp ticket. Click here for instructions on how to comp tickets.