Learning Admins(and Managers with Assignment privileges) can only edit an assignment's meta data for assignments they created.
If you are editing a Scheduled assignment, click Yes when the following message displays:
You can add users in one of two ways, by selecting them individually or via a bulk import using a CSV file.
To add users or audiences individually by selecting them:
To bulk add individual users with a CSV file:
If you need to remove users or audiences from an assignment, cancel it for them. If you select the X next to a user or audience, it does not remove them from the assignment.
If you remove a learner from an audience associated with an assignment, the user is removed from the assignment and they receive a cancellation email notification.
The order in which the content is arranged here is the order in which it is presented to the learner.
Also, assignments with the same due date are listed by when the assignment is launched, in ascending order, on a learner's assignments page and on the home page.