The title bar of the Pick One quiz window shows the quiz name and tells you how many items are in the quiz.
The upper left panel shows you the name of a bird. The main panel of the window shows four pictures.
To answer a quiz, click on one of the four pictures.
If you make an incorrect guess, you may click the Show Names button to display the name of all four birds.
The difficulty option (Easy, Medium, Hard) set in Setting Multiple Choice, Fill-in-the-Blank or Pick One Options determines which pictures are shown. The harder the quiz, the more similar the four birds will be.
At the bottom right corner are controls for progression of the quiz.
To redisplay the previous item, click <<Previous.
To resize the window, click and drag any corner, or double-click the title bar. Your last resize is saved for the next quiz you take (of any type).
To stop the quiz, click Stop. If the quiz has not completed, when you later start the quiz wizard and it finds an unfinished quiz, it asks whether you want to finish it.