i have a regular colored picture but what i wanted to do was change most of it to greyscale, but have certain sections still in color. can someone help please
Make a new layer of your color image.
Desaturate the new layer.
Erase the part of the desaturated layer where you want the color to show.
Adjust the opacity a bit if you want to tweak how much color shows.
I always work with multiple layers, in case I mess up and want to delete that particular layer and start over.