Concept: The lesson is designed using Adobe Photoshop. We have used selections, different combination of image editing tools and filters for most of the effects. Photoshop comes up with lots of the options and scope for experiment is much more than you can imagine. We wish to encourage you to use different options and tools to get better output. The lessons and techniques described need to be followed as a guideline to achieve the effect.
Grayscale mode uses 256 shades of gray with each pixel
retaining its brightness value from 0 (Black) to 255 (White). This
is different from desaturate command as it chages the mode itself.
Its no more RGB.
1. Open an image to apply photoshop Grayscale mode.

2. Image > Mode >
Grayscale
3. You will get the the grayscale image as follows.

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