Color correction module does not work with a trackpad.
The "color correction" module allows the value on its saturation slider to be changed in increments of 0.1 by scrolling over the color board area. With a trackpad, this feature is usable in Darktable 2.2.5 and prior versions, but not in Darktable 2.4.1. The specific behavior varies by platform:
- On MacOS, the sensitivity has increased to an unusable degree: the slightest hint of a scroll gesture on a trackpad will send the slider's value hurtling very quickly to
3 or +3 -but still in increments of 0.1.
- On Linux (Fedora), the sensitivity has also increased (but to a lesser degree) and the slider value changes in increments of 0.01 rather than 0.1.
On both platforms, behavior is as expected when using a mouse with an ordinary scroll wheel.