To make changes on a dashboard, open Dashboard Details by clicking on the board’s name in the upper left corner of the screen or in a tab at the bottom of the screen. A popover window will appear for editing the dashboard. Change the name of the dashboard in the name field and then click Enter.
To add a description, click on Dashboard Description under the dashboard name field, type your text, and click Save changes.
In the same menu you are able to make additional types of changes such as: creating a dashboard copy, deleting a dashboard, editing color labels for cards, setting up email notifications, and exporting dashboard information (title & descriptions).