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1. Re: How to change curves shadow/highlight orientation
josephlavine Mar 21, 2014 8:03 PM (in response to pickfordpictures)In the upper right corner of the Curves window is a dropdown where you can set the Curves Display Options. Switching from Light (0-255) to Pigment/Ink(%) will swap the white and black point, but you'ss see adjustments in percentages and not Light (0-255).
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2. Re: How to change curves shadow/highlight orientation
pickfordpictures Mar 21, 2014 8:08 PM (in response to josephlavine)Why is it that some of my older PSD files open with reversed curve orientations and others don't?
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3. Re: How to change curves shadow/highlight orientation
josephlavine Mar 21, 2014 8:11 PM (in response to pickfordpictures)Are some of your images RGB and others CMYK? RGB files use Light and CMYK uses Pigment/Ink.
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4. Re: How to change curves shadow/highlight orientation
pickfordpictures Mar 21, 2014 8:21 PM (in response to josephlavine)Some are grayscale and some are RGB. The problem occurs mostly with grayscale files, though not with every one.
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5. Re: How to change curves shadow/highlight orientation
SaturnV Mar 21, 2014 11:02 PM (in response to pickfordpictures)RGB is additive color (light-based), so the graph defaults to Light.
CMYK and Grayscale are subtractive color (ink-based), so for those the graph defaults to Pigment/Ink.
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6. Re: How to change curves shadow/highlight orientation
pickfordpictures Mar 24, 2014 12:36 PM (in response to SaturnV)Thanks for the explanation. I now see that in CS6, if I convert an RGB file to grayscale, the curve orientation does indeed reverse. By changing the curve display mode to ink based, I can get it back back the way I like it.
In which Photoshop version did this change occur? Back in the CS and CS2 days the curve was the same in either RGB or grayscale. I also have CS4, but I can't recall whether that feature is present there or not.



