Photoshop: How do I go from Tile view back to one image at a time?

I can find instructions for getting to a view where I can see all my open images. I wanted to match the brightness in two before copying a section from one to the other. Now, I just want to work on the one and can't minimize or hide the others. Your answer won't help this time because I am just going to close the other 4 images I have open, but I would like to know.