Two buttons at center bottom help you mark questions and return to them later.
Click "Mark" to mark a question for later review. The word "Marked" will appear at the top of the screen. Click the "Mark" button again to unmark the question.
Click "Review" when you want to check your progress through the test. This opens a list that shows every question, and whether you have seen, marked or answered the questions.
The Review List displays every test question and its section. Links allow you to go
to any question directly from the Review List.