You can copy all playlists in two different ways.
1. Go to the display preview by clicking the screen on the Displays (media playrs) tab
2. Open the playlist's three-dot menu in the screen preview
3. Select the playlist
You can copy a playlist with the same settings to the screens it is already linked to.
In this case, the original playlist will not change, but a separate copy will be made according to the selected settings.
1. Open the playlist settings from the main page and go to advanced settings.
2. Make desired changes to the playlist settings
3. Save the playlist as a copy