See video explanation for 2020 models here: https://www.youtube.com/watch?v=cwoxwMheJFU&t=356s
To adjust the picture settings, please tune to or play the source you wish to adjust.
To adjust the picture settings for Netflix (or any app), sign into your account and play a video.
To adjust the picture settings for an antenna channel, tune to the channel in question
To adjust the picture settings for any wired connected device such as a cable or satellite box, DVD or Blu Ray player or Game system, tune to the input the device is connected to.
Then simply press the Options button on your remote., This button is the Third button from the top on the right side of the remote.
The options button will bring up the TV Options Menu. Scroll to the right to access "Settings"
You will now see the settings menu and Picture will be white and accessible.
Select Picture and adjust any of the settings you wish: Picture Style, Backlight, Contrast, Brightness, Color, Tint, Sharpness, Picture format, etc.