What gestures or buttons make the Apple TV in Netflix app zoom/stretch the image to fill screen?
On the Apple TV 4K (2017) using Netflix app, I somehow zoomed/stretched an old tv show with nearly-square aspect-ratio to fill the screen of this 4K TV.
Only the Apple TV remote was in use at the time. Seems to have happened when I swiped my thumb on the touch surface rightward from left edge, but I'm not sure.
Workaround: Crash the Netflix app and relaunch.