How can I change the sentiment via the dashboard?
First, open the monitor and toggle to the bubble stream view. In the bubble stream, select any particular mention to change the sentiment. At the bottom right corner of the mention is a three-dot icon to select. Options to change the sentiment from the original sentiment will be available. In this example, it can be changed to positive or negative. Once changed, the monitor will update without needing to refresh.
Learn how to mass change sentiment here.