Use this menu selection to equalize each color channel in the open image individually. In some cases, equalizing the color channels will improve the appearance. ThumbsPlus will attempt to modify levels of each color channel to come as close to even levels of each as possible.
NOTE: This process is similar to use the "Equalize" button in the Image | Histogram dialog whith the "Show Channels" option enabled. If you want to work on the global intensity levels of the image, use the Histogram function with the "Show Channels" option disabled.