@tina_christophe ...
What question type are you trying to use in conjunction with Grading Notes in a New Quiz? In my own sandbox course, I went into an existing New Quiz I have in my course, and I looked at each question type. The only question type I could identify that has the Grading Notes option is the "Essay" question type. When I add an essay question to my new quiz, below the areas to give the essay question a title and a question/prompt, there is a section for "Options" with five check-boxes. Below that is the "Grading Notes" heading, and if you click on that, a text box appears where you can type in whatever text you'd like. This is described in:
To my knowledge, there is nothing extra that would need to be "turned on" in order to use the "Grading Notes" in an essay question of New Quizzes.
I hope this will help a bit. Sing out if you have any other questions about this...thanks!
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