Introduction
When an Instructor adds an assignment to his/her Blackboard course using the Assignment Tool it will be shown with this icon:

How Assignments Work
When you click on the View/Complete assignment link:

You see this screen:

You can return to this link to view not only the grade for your assignment, but also any comments that the Instructor may have included.

For a video tutorial on using the Assignment Tool, click here. (Courtesy of Blackboard Inc.)