Duplicating a dashboard enables the users to create a copy for any dashboard. You can modify the content and layout of the duplicate dashboard without affecting the original one.
In the Document portal, select the dashboard for which you want to create a copy.
Click the More button next to the selected dashboard and choose Duplicate from the options.
Or,
Click the Duplicate button on the top-right corner of the Document portal.
Note that the duplicate dashboard is saved with the following name, that is, 'Name of the Original Dashboard' + '-Copy'.
For information on renaming a dashboard, see Rename a Dashboard page.