In Chapter 5, Developing Interactivity, you created a sequence of slides to teach students about the different types of train ticket available in Belgium:
- On slide 13 of your takeTheTrain.cptx project, you have three Buttons, one for each ticket type. Each of these Buttons takes you to the corresponding slide in the sequence.
- Slides 14, 15, and 16 are the three destination slides of the Buttons defined on slide 13. Remember that, at the end of each of these three slides, the playhead jumps back to slide 13.
- Also remember that you used the Visited state of the Buttons to add a checkmark next to the ticket type that has already been viewed by the student.
In this section, you will make sure that the student goes through the three ticket types before clicking the Continue button that you added in the bottom right corner of slide 13.
To do so, you will first hide the Continue button. Then, you will create three User Variables to track which ticket type...