We have Moodle 3.02+
I don't understand some options in the quiz module for example:
1 / in the quiz grades page (see screenshot):
* what is the difference between the button "Regrade all" and the button "dry run a full regrade"
* and also What does the filter "Show only attempts : that have been regraded / are marked as needing regrading" means ? I regraded a question manualy but when I checked the box of this filter nothing is displayed
2 / in the preview page of a question, what is the "save" button for?
3 / in the question bank, what will happen if we check the box "Also show old questions" what is an old question?
Thany you very much in advance for your answers it's very important for me