Hi Apb5, We appreciate your feedback regarding response time. For optimal performance, please ensure your TV is running the latest firmware. You can check this by going to: Home > left directional key > Settings > Support > Software Update To further optimize performance, try running Device Care, which checks memory, clears unused cached data, and closes background apps: Home > left directional key > Settings > Support > Device Care > Start Device Care If issues continue, please reach Samsung Support at 1-800-SAMSUNG (8AM – 9PM EST Mon – Fri, 8AM – 6PM Sat – Sun). LiveChat is also available via the ‘Support’ link on our website. ~ Samsung Advisor

Hi RadMan, You can turn your U7900F TV’s Closed Captions on/off and change the settings such as separating it from the broadcast screen, font color, background color, size, position, language, etc. by going to: Settings > All Settings > General & Privacy > Accessibility > Caption Settings. If we can help with anything else, please call us at 1-800-SAMSUNG, (8AM – 9PM EST Mon – Fri, 8AM – 6PM Sat – Sun). LiveChat with an agent as well as manuals, software, and warranty info can be found at the ‘Support’ link on our Samsung website. ~ Samsung Advisor