When I open Color Efex 6, I see the HSL module, then if I add a filter, let’s say Pro Contrast, I don’t seem to be able to add another filter without it displacing the Pro Contrast… in other words, I can’t stack my filters like I used to. Am I suppose to hit Enter or something…
In the screenshot you see, that “Low Key” was already added.
Then I clicked on the → + button to further add “Midnight” without deleting the other one .