In the Channels section, click the green 'New' button at the bottom of the screen. The new channel window will then display.
Within the Channel Settings section, add a name for the new channel and toggle Eco Mode on or off.
When Eco Mode is turned on, each device listening to this channel will enter a stand-by mode and remove signal to the screen. If screens are configured correctly, this will allow the screen to wake up when content is displayed and enter a power mode when content is no longer displayed.
Once all settings have been completed, click 'Save' to create the new playlist.