I worked on lesson on seven today that has to do with Brightness and Contrast.
I selected the auto tone layer and then went to the Image menu and selected the auto tone tool.
I turned the auto tone layer off and chose the auto contrast layer and then went back to the Image menu and chose auto contrast.
I then turned the auto contrast layer off and selected the auto color layer and again went back to the image menu and chose auto color and in this feature finds the darkest pixels and make a neutral black, finds the brightest pixels and makes it a neutral white, and a representative mid-tone pixel and make it a neutral gray.
I turned the auto color layer off and selected the auto B/C and then went to the Image menu and chose the Adjustments option and then Brightness/Contrast and clicked the Auto bottom.
I turned the auto B/C layer off and selected the double auto layer and then went to the Image menu and chose Auto Contrast. I then went to the Image menu again and chose Adjustments and Brightness/Contrast and clicked auto again.