Previously, Gimp 2.8 and earlier used a dialog with the familiar "radius, amount, threshold" parameters as described at Unsharp mask - what do the parameters do?, like this. In preview builds of ...
I have a 10" android tablet and 15" laptop. Darktable and GIMP is installed on my linux laptop. Controlling sliders/curves etc of darktable /GIMP from mouse is not efficient, for me at least. I see ...