Keyboard shortcuts: curves – Adobe Photoshop CC 2014 v.14.xx User Manual
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Add contrast to the midtones of a photo with Curves
If the image uses the full tonal range, but needs midtone contrast, Click the Curves icon
in the Adjustments panel. Drag the curve into an S
shape.
Increasing the slope in the middle of the curve increases contrast in the midtones.
Keyboard shortcuts: Curves
You can use these keyboard shortcuts for Curves:
To set a point on the curve for the selected color in each color component channel (but not in the composite channel), Shift+Ctrl-click
(Windows) or Shift+Command-click (Mac OS) in the image.
To select multiple points, Shift-click points on the curve. Selected points are filled with black.
To deselect all points on the curve, click in the grid, or press Ctrl-D (Windows) or Command-D (Mac OS).
To select the next higher point on the curve, press the plus key; to select the next lowest, press the minus key.
To move selected points on the curve, press the arrow keys.
(Curves dialog box) To set a point on the curve for the current channel, Ctrl-click (Windows) or Command-click (Mac OS) in the image.
If you’re instead using the Curves adjustment, simply click in the image with the On-image adjustment tool .
For more information
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