How can I get this behavior out of juce::Slider?

[rami]

I think this might be what you’re looking for.

How do I set the Vertical drag sensitivity on a knob

[How to fix juce::Slider (Sensitive Mousewheel)] this video shows you how to add sensitive mousewheel support at all, but you can also use the same technique to adjust the drag sensitivity. to be more precise: you’d override mouseDrag() and there if ctrl multiply the y-drag offset by some value and then call the base class’ mouseDrag with it.