Specify a Paper Type and a Screen
You can create 28 sets of correction data.
7 paper types 
4 screen types = 28 combinations
Both the correction data and print jobs have information of the combinations.
Based on this information, this machine selects data that are appropriate for a job.
On the [Calibration Manager] screen, click [Settings].
The [Paper Type/Screen Settings] screen is displayed.
Select the paper type.
Select the screen type.
The screen type is displayed in [Current Screen Settings]. For details, refer to Custom Screen: Selecting the Screen Type.
To set the Custom Screen, click [Detail].
The [Custom Screen] screen is displayed.
For each color, select the Dot shapes, Screen Frequency, and Screen angle, and click [OK].
The screen returns to the [Paper Type/Screen Settings] screen.
Click [OK].
The [Calibration Manager] screen returns.
Go to Calibrate.
The settings are preserved, and displayed when this screen is accessed next time.