After posting a question or an answer, users may modify it by editing, hiding, deleting, or locking it. Select the three dots in the upper-right corner of the post to display the options to edit, hide, delete, or lock a post.
Note: Instructors will be able to perform these actions on all posts; students will only be able to modify their own posts.
Select the menu.

Select the menu (represented by three vertical dots) for a post or answer to reveal the modification options.
Note: Any actions taken on Questions will also affect the Answers and Comments posted on them. If a question is locked, any Answers or Comments associated with it are also locked.