How to prevent next and back buttons from disappearing when reopening a page

How can I stop disappearing next and back buttons.

How to turn off (get out of) Question Pool mode that is empty?

In reading a chapter “Working with Quizzes”, the author said to select Window > Question Pool. Now just about everything about any object that could be in a quiz has all its Quiz panel information grayed out. How can I get out of Question Pool mode–go back to not having a Question Pool?