Grayscale
The Grayscale effect converts color images to a gray scale palette: black (0) and white (255).
In the Properties Area of the Video Effect window you can change the effect propertieschange the effect properties.
The only property available for setting is the Desaturate option. You can check the Desaturate box to desaturate the video to the shades of gray (remove colors). The desaturated video may be slightly darker and can lose some detail.
In the figures below you can see the video picture before and after applying the Grayscale effect:
Before applying the Grayscale effect
After applying the Grayscale effect