How do I message students who have not signed up for a self sign-up group?
Canvas recently introduced a new page design called the New Canvas User Interface (UI). Depending on your Canvas view, your page design may vary from the images shown in this lesson. However, the functionality and location of the components remain the same.
If you have created a self sign-up group within your course, you can message students who have not yet signed up for a group and remind them to do so.
Open Group Set
Click the View User Groups button  or an existing group set .
Confirm Group Creation and Options
Message All Unassigned Students
To send a reminder to students who have not signed up for a group, click the Group Set Settings icon , then click the Message All Unassigned Students link .