As of October 26, 2018, quizzes will auto-save. This means that when students are responding to quiz questions, their responses will automatically be saved by the system. The 'Save' button will be removed, so the process of clicking 'save' after each response will no longer be necessary. Once the response is auto-saved, you will see a check mark on the question number on the left-hand side of the screen.
The vendor, D2L, has updated this functionality as part of their monthly continuous delivery updates.