Editing Selected Areas- Part I
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Transform 9

Here we’ve opened up the Brightness Curve transformation while the mask creation window is still open, and we see the little mask window in the Brightness Curve box (just right of the Amount sliders) is mostly black with a little white dot near the center – that dot is where our mask is located. The white slider is at 100% and the black at 0%, so any curve change we apply will affect the center of our mask most, and fade towards the edges of the mask. This is what we want. I have applied a strong curve, pulling the top of the curve to the left three divisions on the histogram scale and bowing the center down. The results can be seen in the preview window, and on clicking OK in the Brightness Curve window, a new image will be created with the change . . .