I want to create a take home exam in Canvas, using 'graded quiz' so that MCQ will be marked automatically. I have set unlimited attempts and no time limit.

I would like the students to be able to work on the exam in Canvas, then save it and continue or edit their responses at a later date. Right now, Canvas does not save their responses, so even though they have unlimited attempts, they have to enter all the answers each time.

Any suggestions how to make this work?