Setting a Deadline for a Submission Box

You can set a deadline for submissions.

https://gyazo.com/82caab35a0f5cd165c1c4b96b662e3c4

Submissions can still be made after the deadline

The time is displayed below the response, allowing you to determine whether the submission was made within or after the deadline.

Submissions made within the deadline are displayed in green.

Submissions made after the deadline are displayed in gray.

https://gyazo.com/2d77589e846de0c1a2390d50d41bece8

Reference