Blending Modes with the Clone Stamp Tool
I am trying to understand how the blending modes work with the clone stamp tool. I have a sample image.

When I sample the green and clone over the yellow which is lighter and the dark red with a Darken Blending mode I expected the cloning to only appear on the yellow. As shown. However, selecting a blending mode of Darken for the clone stamp did not seem to do this. Only when I changed the Layer blending mode did this happen. All of my rectangles are on one layer below a blank layer which I am cloning onto.
I don't understand what the Clone Stamp blending mode is doing for me here. I had hoped this would help when cloning up to edges, but it seems not.
If anyone can offer a simple explanation I would be grateful. Thanks
