I dragged the histogram in the tool panel, I moved it into the dialog box and then I connected (top) the moviefilein into he histogram, but it doesn’t show me the histogram, only the video. I’m working from MacBook Pro. Help.
It worked for me on both 14650 and the newly posted 15840. I used the default sample file and connected displace1 to the histogram. What build were you using this on? What version of macOS?