Look in this chapter to find answers to questions on:
Q What is Dynamic Range?
A Dynamic Range is a term used to describe the tones in an image—the range of tones from shadows through highlights.
Q What is Equalize?
A Equalize (found under Image>Adjustments) is an automatic function that redistributes all the pixels in an attempt to give a wider range of brightness values. There are no settings; the command just makes an adjustment based on the existing pixels. This means that sometimes there will be an improvement, while other times you may find the image looks worse ...