Follow these steps in order to turn off closed captioning on a Smart TV:

1. Access Settings – Select Menu located on the remote control, or using the on-screen display, locate Settings.
2. Locate Subtitles – Within the Settings menu, choose the Subtitles or Closed Captioning setting.
3. Turn Off Subtitles – Disable Subtitles or Closed Captioning. You can also customize font size, font style, and background color depending on the TV model and its internal settings.