Hi there!
In the awesome Lr Classic I often use the Auto Settings feature. Great starting point for further edits or one-click solution to get perfect result. But sometimes are the new settings simply too strong and I would like to slide the settings back, lets say 60%.
Instead of pulling all the 10 top-most sliders half-way to the left (and of course I move them approximately, because multiplying all the 10 numbers by 0.6 would take ages), it would be great to have one General Slider to controll all the main sliders back to zero.
So if you set Exposure to +1, Contrast to +50 and Highlihgts to -10, the General Slider would be 100. By sliding General Slider to 50, you would set Exposure to +0.5, Contrast to +25 and Highlights to -5.
Or simply, like a virtual layer on the top, just one slider for everything (not just for Basic sliders): Blend with Original 0 — 100.