You can create rich grayscale images when you can control the brightness of the red, green, and blue channels, as well as the overall brightness. Use the Convert to Black and White tool to emphasize different areas or aspects of a photo, as well as alter its mood and tone.
If you hover your mouse over each slider and watch the effect on the small preview, it shows you which parts of the image will be affected by each channel. This helps to gauge the effect of each slider on the image.
You can save your settings as a preset for future use.
To Create a Grayscale Image:
The more red there is in a pixel, the more effect the red slider has on that pixel. The area of red in the picture is brightened or darkened more than other areas.
The more green there is in a pixel, the more effect the green slider has on that pixel. The area of green in the picture is brightened or darkened more than other areas.
The more blue there is in a pixel, the more effect the blue slider has on that pixel. The area of blue in the picture is brightened or darkened more than other areas.
You can right-click the slider to reset the value to zero.
You can use the Edit Brush to paint this effect onto specific areas of your image.
You can use the Gradient Tool to transition this effect across specific areas of your image.
Click Reset to clear your changes and reset to default settings. If you saved your changes, you cannot reset your settings. If you want to discard only the Edit settings, select File | Restore to Developed.