one of my lousy images has the histograms concentrated all only into the central 1/3 of the available range. I tried to adjust the RGB histograms individually with the RGB curves in the colour management tab (to achieve what I can do with CTRL+L in PhotoShop). But if I adjust the R channel, also the G histogram moves. Why is that?
What I want to accomplish is that all three histograms cover the entire available range, i.e. the shadow / highlight points are at the minimum / maximum level.
PS: I use Version: 5.0-r1-gtk3