Adobe Photoshop is an advanced graphics-editing and photographic-editing software program. It allows users to blend digital images, remove unsightly images in photographs, execute exposure and lighting adjustments, change colors and many other things. Photoshop even allows users to remove gray hair from a photograph subject in a way that looks natural. Using the program's "Burn Tool," which incrementally darkens selected portions of a photo, you can eliminate gray hair from any photograph.
Open the "Layers" palette at the right of the application window and drag the "background" layer to the "Create a new layer" icon at the bottom of the palette. This will duplicate the layer so you will retain an original copy of your image.
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Select the "Burn Tool," nested beneath the "Dodge Tool" in the tools panel at the left of the application window.
Adjust the brush size as needed in the tool options panel at the top of the application window. Set the range to "Midtones" or "Highlights" depending on the darkness of the gray hair. Set the exposure at 30 percent or lower so that your adjustments aren't too dramatic. You can brush over the hair again if the exposure is too low, but it is best to use the "Burn Tool" in increments.
Click and drag over the areas of gray hair you want to get rid of. Repeat this until the gray hair is gone. Save your image under a new name using the "File" > "Save As" commands.