Go to Main Menu > User Settings > Configure Dashboard.
You will be provided with options to rename a dashboard 
(Enter a new name and click the check mark 
. Click Save), change dashboard’s layout (select the new layout and click Save) or delete a dashboard 
.
Other options:
- Disable / enable the Summary Console.
- Controls whether or not to display the Landing Page after logging in.
- Specify the refresh interval for dashboards which specifies how often viewlets are refreshed in all dashboards. It is especially useful for viewlets which display real-time data.