the HowTo Read Pixels of a Texture help patch is half broken.
It got renamed to “UV”, alongside all other nodes that used “Relative”.
I find “UV” quite cryptic for non-graphics nerds, “Relative” was pretty self-explanatory. @ioreg or @untone might explain why it is like this now.
thanks, fixed the helppatch. “UV” refers to the uv-space that you define the coordinates in: topleft 0/0 to bottomright 1/1