How to use Netflix’s ‘secret’ video test patterns to improve your 4K TV’s picture
Steps for how to use Netflix test patterns to adjust TV picture settings
open into Netflix on your computer and then enter
https://www.netflix.com/title/80018499
into a web browser right now
Add the Multipurpose Chart 1920 x 1080: 60fps test pattern (S2: Episode 8) to your Netflix library by clicking on the Add To My List (+) button now
Open the Netflix app on your TV
Select the Multipurpose Chart 1920 x 1080: 60fps test pattern in the My List section
Locate the PLUGE patch in the multipurpose chart
Control TV’s Brightness
Adjust your TV’s Contrast control
Use the test patterns to adjust your TV's settings, such as brightness, contrast, color, and sharpness.