This feature is available in Ultimate edition only.
Click the New Dashboard button on the top right of the dashboard.
Enter the Description in the field provided, and then click Save. This name is used as the dashboard tab label.
Now, you can add the panels to the dashboard. See Adding a Panel to an Analytics Dashboard for instructions.
You can also create a new dashboard by copying an existing dashboard.
This feature was added in the Winter 2017 (17.0) release. It is not available in older versions of Lifecycle.