Duplicating second layer then making it b&w. can i do that? on photoshop?

i have a second layer with the same picture on it as the first, but can i make the 2nd one b%26amp;w without making the first one b%26amp;w?Duplicating second layer then making it b%26amp;w. can i do that? on photoshop?
Yes, go up to Image %26gt; Adjustments %26gt; Desaturate.





Just make sure you have the layer you want to be B%26amp;W selected.

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