I just got off the phone with 2 tecs trying to figure out how to make my black and white box changes work. I am having issues with layers. The Tecs could not hlep me. Anyone out there knowledgeable?
I guess you are working on a grayscale image or a mask , that is why you are unable to choose any color for the foreground and background box and it for that reason it seems to you that they are not working. Choose "Image Menu>Mode>RGB" in case you are working on a grayscale image. In case working with layer mask , then choose the layer.