Shadow and Highlight clipping in histogram in ACR version 10.0.0.827

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I've been using ACR since the beginning, and when my shadows were clipped, I'd see a triangle at the top left of the histogram turn white when all colors found black, and same for the highlights. Now I don't get that. I have to turn on the blue mask for shadows and red for highlights, which is fine for some images, but it's just a distraction for me. I'd know immediately that I had a solid black when the shadow triangle turned white. Can we get that to happen on the new ACR? I'm on a Mac.
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Mike Peters

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Posted 5 months ago

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Andrew Rodney

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Watch this video, it shows what's going on with clipping, Histograms etc:

Everything you thought you wanted to know about Histograms
Another exhaustive 40 minute video examining: 

What are histograms. In Photoshop, ACR, Lightroom.
Histograms: clipping color and tones, color spaces and color gamut.
Histogram and Photoshop’s Level’s command.
Histograms don’t tell us our images are good (examples).
Misconceptions about histograms. How they lie.
Histograms and Expose To The Right (ETTR).
Are histograms useful and if so, how? 

Low rez (YouTube): https://www.youtube.com/watch?v=EjPsP4HhHhE
High rez: http://digitaldog.net/files/Histogram_Video.mov