Buy tickets online.
Buy (fake) tickets to see what your patrons would see when they buy tickets.
Click on the top link in the Management panel of the dashboard (View shopping page). Make sure you buy enough tickets to see at least one at every price and in every section, if you have more than one. Keep in mind that this step will help you decide if your patrons will be able to buy tickets without help.
Charging is fake, and fake credit card information will automatically be filled in.