When you make a config with the image adjustment shader and you copy the contents to be shared on another computer, and said system/retroarch loads the manually edited shader, the values show as 0.000 in retroarch. If you save in retroarch with that value, it erases your config. If it’s saved manually in the shader file instead, it works in retroarch as you wanted but the values will still all be 0.000. So the visible values aren’t being loaded into retroarch properly if edited from the shader file.
Why not just redo it through retroarch? Because it takes a really long time to stop and test and even set up the image-adjustment shader. It is the longest shader configuring out of all shaders. Especially when the 0.000 digit doesn’t show/work. It only shows up to the 0.00 digit. So it’s impossible because you can’t see the numbers properly if the increase/decrease increments are modified to a lower value. NOt being able to use lower values can overshoot or undershoot your destination adjustment.