The instructions below will demonstrate how to change the duration in which announcements appear in the My Announcements box.
Accessing Course Announcements
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Log into your Blackboard course and go to the Course News page. Locate the box labeled My Announcements and hover your mouse cursor over the box. Click the gear icon (Manage My Announcements Module Settings) in the upper right hand corner to access the announcements settings.
Changing Announcement Display Preferences, Part 2
You will now see a screen labeled Personalize: My Announcements. Under Edit My Announcements View, locate the dropdown menu labeled Show Announcements For and select the desired duration. The announcements can be displayed for Today, 7 Days, 30 Days or all announcements created can be displayed. When you are finished, click Submit to save your changes.