Edit a quiz to modify its title, description, and position (the time at which the quiz prompt appears). You can edit individual quiz settings any time after a quiz has been published.
To edit a quiz:
1. On the presentation’s properties page, click Edit Quizzes and select a quiz from the list.
2. Click the Settings button next to a quiz title and edit the title, description, and time position of your quiz.
Edit quiz settings
3. Click Done when you are finished. Click Save.