Use the Rename Dashboard dialog box to rename existing dashboards. You can only rename a dashboard if you are the owner of the dashboard or if you are a member of the SYSADMIN group.
To rename a dashboard:
On the Navigation menu, click Dashboards then select the dashboard that you want to rename.
On the Dashboard toolbar, click Dashboards ยป Rename Dashboard.
On the Rename Dashboard dialog box, enter a new name for the dashboard. Then click OK.
The dashboard displays with the new name.
Learn about the Dashboard toolbar
Configure access control to dashboards