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Click the "Color Adjust" button that resembles a prism with a ray of light running through it.  This will open a menu that allows you to adjust the colors of the image. Adjust the colors of the images with the following options.   Curves:  The graph at this top of the menu is the curves.  You can adjust the curves by dragging the three tabs below the image.  You can also click "Auto Levels" to automatically detect the best levels for the curves.  Exposure:  Drag the tab in this slider bar to make the image lighter or darker.  Contrast:  Drag the tab in this slider bar to adjust the contrast between the lighter and darker parts of the image.  Highlights:  Drag the tab in this slider bar to increase the lighter parts of the image.  Shadows:  Drag the tab in this slider bar to increase the darker parts of the image.  Saturation:  Drag the tab in this slider bar to strengthen or weaken the colors in the image.  Temperature:  Drag the tab in this slider bar to give the image a "warmer" or "cooler" tone.  Tint:  Drag the tab in this slider bar to add a red or green color overlay to the image.  Sepia:  Drag the tab in this slider bar to add a golden tint to the image.  Sharpness:  Drag the tab in this slider bar to sharpen or blur the image.
Click . Adjust the color.