Question

How do you convert a picture into Grayscale in Photoshop?

Answer 1

Answer:

Like the other user said, you can go to image and change the mode, however you can also use a black and white adjustment layer.

Answer 2

Hey there again!!!

Open your photo into Photoshop. 
Convert to grayscale. (Image—Mode—Grayscale).
Done

Hope this helps. c: