Renaming a dashboard is useful especially when you want to change the default name for a duplicate dashboard. You can change the name of the dashboard as many times as you want.
Select the dashboard in the Document portal for which you want to change the name.
Click the More button next to the selected dashboard and select Rename from the options.
Enter the new name for the dashboard in the Name field of the Properties window. Note that your dashboard is saved with a new name.