1 Print a hard proof with calibration bars included. (See "Setting output options" on page 473.)
2 Using a reflective densitometer, take a reading at one or more marks of the printed calibration bar.
3 Do one of the following:
• In Windows and Mac OS 9.x, choose Edit > Color Settings, and select Advanced Mode.
• In Mac OS X, choose Photoshop > Color Settings, and select Advanced Mode.
4 Under Working Spaces, for Gray or Spot, choose Custom Dot Gain.
5 For Name, enter the name for the custom profile.
6 Do one of the following:
• Using your densitometer readings, calculate the required adjustments, and enter the percentage values in the text boxes.
For example, if you have specified a 30% dot, and the densitometer reading is 36%, you have a 6% dot gain in your midtones. To compensate for this gain, enter 36% in the 30% text box.
• Click to add an adjustment point in the dot gain curve, and drag the point to change its value. The value then appears in the appropriate text box.
7 Save the custom profile. (See "Saving and loading working space profiles" on page 119.)
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