How do I edit an announcement in a group?
As a student, you can edit an announcement you created within a group.
Open Announcements

Open a group in which you are a member. Then, in Group Navigation, click the Announcements link.
Open Announcement
Click the name of the announcement.
Note: You can only edit announcements that you created. Learn how to create an announcement.
Edit Announcement
Click the Options icon [1], then click the Edit link [2].
Edit Title or Content

Edit the announcement title [1] or content [2].
Save Announcement

Click the Save button.
Content retrieved from https://community.canvaslms.com/t5/Student-Guide/How-do-I-edit-an-announcement-in-a-group/ta-p/459

