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You can use a Gradient Map adjustment layer to select a range of tones.
We'll use the photograph below.
Be sure to check off as you go along.
1) Preserve your original file.
If you haven't already done so, go to Preserve Your Original File.
If you haven't already done so, go to Make a Background Copy.
Let's make a gradient map.
Once made, you can save the gradient map and reuse it at any time.
1) Make sure the foreground color is set to black, and the background color is white.
Press x to cycle between the foreground and background colors.
If the colors are not black and white, press d.
2) Create a Gradient Map adjustment layer (not a Gradient adjustment layer).
Click Create adjustment layer icon, the half-dark, half-bright, circle at the top of the Layers palette, and select Gradient Map.
Your photograph will shift from color to B&W.
The Gradient Map window will open.
3) Click the gradient in the middle of the window to open the Gradient editor window.
4) If it isn't already selected by default, select the Foreground to Background gradient.
The Foreground to Background gradient fades from black to gray to white.
On the top of the gradient, at the ends, are two square icons called opacity stops.
Opacity Stops on TOP of the Gradient
Ignore the opacity stops.
The square icons below the gradient, at the ends, are called color stops.
Color Stops on the Bottom of the Gradient
We'll use the color stops to change the color of the gradient.
5) Double click the black color stop, at the left end, beneath the gradient, to open the Color Picker window.
Make sure you're clicking the black color stop on the bottom of the gradient—not the black opacity stop on top of the gradient.
6) Enter 255 in the R box, and 0 in the G and B boxes.
Your photograph will shift from B&W to red-and-white.
7) Double click the white color stop, at the right end, beneath the gradient, to open the Color Picker window.
Make sure you're clicking the white color stop on the bottom of the gradient—not the black opacity stop on top of the gradient.
8) Enter 0 in the R and G boxes, and 255 in the B box.
Your photograph will shift from red-and-white to red-and-blue.
9) Click just below the gradient, about two-thirds from the left end, to create a new color stop.
The color stop will be blue.
10) Click, hold, and drag the new color stop left or right to position it at the 66% location, as seen in the Location box.
11) Click just below the gradient, about one-third from the left end, to create another color stop.
The second, new, color stop will also be blue.
12) Click, hold, and drag the new color stop left or right to position it at the 33% location, as seen in the Location box.
13) Change the color of BOTH of the new stops from blue to white.
Double click each color stop to open the Color Picker window, and enter 255 in the R, G, and B boxes.
Be sure to change the color of BOTH of the new stops from blue to white.
The gradient should look like this.
Your red-and-white photograph will become red-white-and-blue.
The shadows are red.
The midtones are white.
The highlights are blue.
Save the Gradient
1) In the Name box, type in a new name for the gradient, such as Select a Tone Gradient.
Your gradient is now saved with the default gradients.
Let's select one of the tones/colors.
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