How To Clone a Dashboard Template
Navigate to your Templates control panel, using the left side menu on your root control panel. Then click the "Dashboards" tab.
Click "Create Template".
Next, select the source that your template will start from. To clone a dashboard template, select "Start from a template".
Next, select the dashboard template you'd like to clone. You can clone either a pre-configured template, or a custom template that you've already saved. Once you've made a selection, click "Continue".
From here, you can customize and modify the new template as you see fit via the normal dashboard template customization process.