Xerox 300x 用户指南

The Calibration Preferences command is available only in the 
Expert Calibration user mode.  Refer to page 2-9 for instructions 
on selecting this user mode.  

You can change the active percentage points (but not the appearance of the 
curves) in the Calibration Curves dialog box.       

From the File menu, select Preferences, then select Calibration 
Prefs.  The following dialog box appears:    

Make a selection as desired.

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The first row of numbers (10%, 50%, and 100%) is the default 
setting.  These percentages let you adjust colors in a light area, a 
middle range, and in a dark area.  

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The second row of numbers (5%, 10%, 25%, 40%, 60%, and 100%) 
are the same percentage points used in the Gray Balance dialog box.

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The User defined area lets you select individual percentages as 
desired.  For example, selecting 5%, 50%, and 90% would let you 
adjust colors in highlight, midtone, and shadow areas. 

Click OK.