Go to the 'Maintenance'  |'Templates'

Go to the 'Document-tab' 

Click on the button [Library] (Make sure your browser accepts new pop-ups)

Look up block 'Dashboard'

Click the button [Install] behind the Template that you want to install

Now Re-login to make your 'Dashboard' visible 

Go back to the 'Document-tab'

Search for the Dashboard you just added, click on it to open

Set the template visible at Reports
​

Select 'Show as a dashboard',
to show the new Dashboard in the Dashboard list

Set 'Available for', User/Userroles that may see/use this Dashboard.

Click [Save}