Required User Privileges: Screen Admin
The first step is to click on Manage at the bottom left corner of SalesScreen. A menu will pop up, where you can proceed to click on Screens under the Company headline:
Once on the screens management page, navigate to the "Screens" tab and locate the screen you want to edit the playlist for. A settings panel will appear on the right hand side.
In the settings panel, click the Playlists dropdown and check all playlists you would like to run on the screen.