Xerox WorkCentre Pro 385 User Manual page 245

Tonal Map
If you select the Tonal Map tab, the following will be displayed.
The Tonal Map is yet another way to adjust Highlight, Midtone, or Shadow
levels in your images. When you open the Tonal Map dialog box, a tonal
map consisting of a diagonally straight line appears. Notice that at every
point on the default tonal map, the output shadow, midtone, and highlight
brightness levels are equal to the input shadow, midtone, and highlight
brightness levels.
6-26 Scanning
Tonal Map
tab