You can see comments from your instructor by accessing the assignment and viewing the submission details.
Click the Grades link.
Locate the speech bubble [1] to verify the assignment contains a comment. Hovering over the speech bubble [2] will tell you how many comments there are.
Click the speech bubble [1] to expand the window and view the assignment comments [2]. You can also view the author, date, and time of the comment [3].
To view the details of an assignment, click the title of the assignment.