How do I edit the assignment details of a New Quizzes assessment?
You can make changes to the assignment details of a New Quizzes assessment from the Quizzes page in Canvas. You can make edits to the point total, assignment group, due date, availability dates, and the individual students and course sections who will receive the assessment. You can also add a rubric to the assessment.
You can manage more assessment settings, including selecting the number of assessment attempts and restricting student result view, in the Quiz Settings page.
In Course Navigation, click the Quizzes link.
Edit Quiz in Canvas
Find the assessment you want to edit . To edit the assessment, click the Options icon  and select the Edit option .
To edit the name of the assessment, enter the name change in the Name field . To edit the due date, click the Calendar icon  and select the due date. To edit the point total, enter the point total in the Points field . To view more options, click the More Options button .
View More Options
To change the format the assessment as displayed to students, click the Display Grade as drop-down menu  and select the option you prefer. To remove this assessment from final grade calculations, click the Do not count this assignment towards the final grade checkbox .
In the Assign To field , select who will be required to take the assessment. You can assign the assessment to individual students or sections.
In the Available fields , select the availability dates for the assessment. In progress quizzes will automatically submit when the Until date and time passes.
To add a rubric to the assessment, click the Add Rubric button .
Note: You can edit multiple quiz attempt settings, in Quiz Settings.
To save your changes, click the Save button.