Follow the steps below to copy contacts from one list to another:
1. Sign in to the dashboard
2. Click on the Manage Subscribers
3. Select the source list (from where you want to copy the contacts)
4. Click on the Contacts drop-down button; it will open up a menu.
5. Click on the Copy Contacts To Another List option.
6. On the Copy Subscribers screen select the target list (To which you want to copy contacts).
7. Click on the Copy Subscribers button.