List
Clicking Notifications in the sidebar brings up a list of past and current notifications:
You can also Acknowledge All notifications, or Acknowledge Visible notifications (everything you can currently see on the screen) by clicking these buttons:
If you turn on the Show Acknowledged switch, it will also show past notifications that you have acknowledged:
You can access more options for filtering which notifications to view by expanding the More Filters section:
This section allows you to see All Notifications (those sent to other users) if you are an admin, and filter notifications by Device or Group and a time range:
Last updated