In the Card View Dashboard and the Recent Activity Dashboard, the sidebar contains a To Do list and other sections that help you know what assignments and events are coming up in all of your courses. Learn more about the dashboard sidebar.
View Global Announcement
The Dashboard may also include global announcements, which are announcements created by your institution. To remove the announcement from your dashboard, click the Remove icon.
To change your Dashboard view, click the Options menu . You can view the Dashboard in Card View  or Recent Activity View . If Canvas for Elementary has been enabled in your institution, you can also view the Dashboard in Homeroom View .