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This is a Photoshop tutorial on how to change your images to grayscale non-destructively. Some methods of making an image grayscale are harmful to your image data and can inhibit the possibilities for you image after the conversion. Here is one method I’ve found works quite nicely and is not harmful to your image data.

1. Open up Photoshop, and open an image. I’m going to be using a photo of myself.

2. Duplicate your background layer.

3. Add a new Adjustment Layer by clicking on the black and white circle at the bottom of the layers palette. Choose “Hue/Saturation” and move the saturation slider to -100. This should turn the image into grayscale. Click “OK.”

4. Add another Hue/Saturation adjustment layer, but do not change any settings. Click “OK,” then change the blending mode of that layer to “Color.”

5. Double-click on the second Hue/Saturation adjustment layer (the one set to color) to open its options window. Now, using the Hue slider, adjust your image so that the tones and contrast look nice. Play around with it. This step acts as though you were using a colored filter on a film camera - it filters out particular colors and can really change how an image appears.

6. You may want to also add a Curves adjustment layer to get just the right amount of contrast. If so, add a new adjustment layer of Curves and adjust away. This is the final image.

This method is far more precise and gives you much more control than merely changing the Mode to Grayscale. This way, you can keep your image in RGB mode for future editing purposes - you don’t lose the color data.