When I try to use curves nothing happens. I can bring curves up and do my usual adjustments but nothing happens. I'm using cc 2015. It stopped working in cc 2014 and so I upgraded to cc 2015 and it still doesn't work. How can I fix this problem?
You seem to be lost. This is the InDesign forum.
but it sounds like you might be trying to use the curves on a mask or an adjustment layer.