1. Create a new web resource for the announcements. The type will be Webpage (HTML).
2. In the text editor, on the Source tab add the following HTML. Be sure to save and publish your web resource changes.
<body style="word-wrap: break-word;">
3. Create a new dashboard or edit an existing one. Add a new Web Resource component and find the one you created via the lookup.
4. That's it! When you add new announcements under Settings > Administration, they will appear on the dashboard that you created.