Correct me if I’m wrong, but it seems to me that Vegas’s handling of the “overlay” compositing mode is unlike that of other applications. I would expect overlay to darken portions below that are low luminance, without much affecting things that are high. And transparent areas on the upper track should do nothing. But that is not what I am getting. I would expect that I could use “overlay” to bump up contrast in discreet areas. But it is not working that way. A) It does bump up contrast, grossly, even when there is no clip on the upper track! [Maybe I want a pivot point slider.] B) It is not at all discreet; it ignores transparent areas.