within the development modul U can typ nummers for the value U want...
Just like: black 55 just like U may can do it with the controller slide from right to left and back
But If U typ negativ numbers like -55 the value jumps back to zero!!! that happens on different parameters
I can just work with the controller, but its faster and more exactly by typing the value... And its a BUG... not a feature. :(
(system is OS X 10.09.5)
thanx for help and may be fix it...
Close Lightroom and then relaunch it. If the problem persists reset your LR Preferences file as outlined in the below article:
If still no joy please tell us what version of LR you are using.
It's a known bug -- see this Adobe employee's post in the official Adobe feedback forum for a workaround: Lightroom 6: Negative Values Bug (German). Also, add your vote and opinion to the thread to make it more likely Adobe will prioritize a fix.