The subtitles on my TV appear cropped, and/or there are black bars on both sides of the screen.
Cauese
When screen size is set to “zoom” or “cinema zoom”, subtitle (caption) is cropped.
LG OLED TV on a different level LG OLED TV on a different level
How
to fix
Non-SMART
[Menu] → [Picture] → [Aspect ratio] → [16:9]
After 2012 smart TV
[Smart] → [Setting] → [Picture] → [Aspect ratio] → [16:9]

