Step 1: From your Interact Dashboard click "Edit"
Step 2: Click "Questions" on the left sidebar, then click the question you want to turn on select multiple answers for.
Step 3: Click "Answer settings" then click "Select Multiple Answers" then click "Save" to confirm your multiple answers setting
Step 4: Click on "Answer settings" again to open up the options for the minimum and maximum amount of answer choices a quiz taker can select. The minimum number is the number which the quiz taker must select in order to continue, and the maximum is the most amount that the quiz taker can choose. Once you are done setting the minimum and maximum, click "Save" again.
Step 5: Click on the button text and edit the copy. You can change it to say "Continue" or "Next" or "Proceed" depending on what you want people to click in order to move forward with the quiz.
Step 6: Click "Position" above the button you just changed the text on. If you want to put the button above the answer choices (in the case where there are a lot of answer choices and the button may become lost) you can check the box to put the button above the answer choices.
Step 7: Repeat this process for every question that you want to allow multiple answer choices on.
Step 8: Click "Publish" for your changes to go live on your quiz.