How about duplicating the graph in Color equalizer?

[Annabel2]

Suppose you 're making a change to an area which falls under both mid-tone and highlights. You adjust the graph for one, but then you need to do it again for the other. And if you adjust mid-tone hue and then want to change mid-tone brightness, you have to do the graph again. It would be nice to have a way to say "Keep copying the graph until I say otherwise". What do you think?

[pedrorrodriguez]

I also thought this. It's not a good idea. Since the percentages are not the same, the correction may not necessarily be the same. The simple version of this is the primaries module with gamut coverage at 100% (I also generally set neutral protection at around 0.15)