The best way to see how a test looks to students is to distribute it to yourself in a test class. However, there may be instances where you want to quickly preview the exam. Even though the Teach option doesn't apply to exams, this is the button you'll use for a test preview.

Set the test to Private during the design phase. You can do this through the gear icon and the lock that appears in the popup.

Remove the checkmark next to test. Your test is now a regular LessonUp lesson, which you can preview using the Teach button. Since the lesson is set to private, it cannot be viewed by others.

If you want to see how all the questions work, it's best to turn off the Devices option in the class. You can do this by removing the checkmark. This allows you to easily try out all the questions, such as drag-and-drop questions, without using another device.