Some users may want a dedicated button to control closed captioned.
Each device works slightly differently. Some use a toggle signal, meaning the Closed Captioned either turns On or Off; other devices may scroll through multiple audio sources before turning off; and still others may have a a dedicated signal to control Closed Caption for a specific source.
In any event, use Flipper's Learning Set Up to copy the appropriate signal for your device into Flipper's TV Mute Button.
More details in our article on "Learning" Set Up.