1. Log in to your account at my.wondersign.com.
2. Select or create a new playlist which will have a new device. Here's how to create a new playlist.
3. On the right side of your screen within the playlist, click "Assign Player(s)."
4. After you click "Assign Player(s)," you will be able to view all of the devices you have activated on your Wondersign account. If you have a a lot of devices, you can use the search bar to locate your devices by name, tags, or location on your devices.
5. After you have checked the devices you want to add to the playlist, click on "Apply."
6. The devices you want assigned to the playlist will now appear above "Assign Player(s)" on the bottom right of your screen. Make sure you hit "Save Playlist," and all the devices listed will now receive content associated with the playlist.