We all know that the tone curve module holds a heavy influence on the overall look of an image, but given the complexity of how individual curves and RGB channels interact with one another (think luminance, contrast, color cast), I'm always left asking myself: Why can't I individually preview each curve and channel?
Much like the Color Grading and recently updated Masking Modules, I'm asking for Adobe to bring those "toggle preview" features to the Tone Curve, affecting the Parametric/Point curves and the Red, Green, and Blue channels. I attached a handful of screenshots that detail an example of the toggle preview from the Masking Module, and where the action/function of the feature can be placed in the Tone Curve Module.
Being able to preview each curve/channel individually will bring immense benefits when tweaking the input/output values. Thus, users would have the ability to pinpoint and isolate how certain curves/channels are influencing the entire look of the photo. This would help photographers on all levels as beginners and experts can experiment while knowing the "why" and "how". In addition, the preview would make this module feel more approachable and less like a guessing game for photographers trying to enhance their images. Sectioning out the Masking Module helps photographers decipher which adjustments complement the image and vice-versa, so how about we bring that logic to the Tone Curve?