I have created another layer of the same image; this is highlighted on the bottom right off the page.
I am now changing the copied layer to black and white.
Again i could change the mood of the image by changing the colours when it is in black and white.
I have used the lasso tool to select a part of an image. Once I do this I can rub out the black and white and make it colour again.
Now i have changed a part of the image back to colour.