The fastest method, can also use the shortcut Command+Shift+U on macs, and Control+Shift+U on PC’s
Select your layer, then navigate to Image>Mode>Grayscale
When prompted, select the discard button. We can always use command+z to undo any steps, so don’t worry.
By navigating to Layer>New Adjustment Layer> Hue/Saturation you can change the image to black and white while maintaining control over values. This method is also referred to as “nondestructive” because it can be reversed at any time (as long as it’s saved as a PSD).
With the Hue/Saturation sliders on hand, lowering saturation, hue, and lightness values can give you a customizable black and white image.
Tutorial provided by CJ, a talented Photoshop enthusiast and intern for Three Rivers Creative Arts .