UMAX Technologies Astra 6400, Owner'S Manual

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The Descreen feature is unavailable when you have chosen the B/W
Document, Fax or OCR resolution settings.
To change the Descreen setting:
1.
Click the Descreen option to display the drop down menu.
2.
Choose one of the descreen options:
No Descreen — No Descreening.
Magazine — Specifies 133 lines per inch. This option
smoothes the fine dot pattern found in glossy magazines.
Newspaper — Specifies 85 lines per inch. Smoothes the coarse
grain pattern commonly found in newspaper images.
Art print — Specifies 175 lines per inch. Smoothes the fine
dot pattern found in high quality art prints.
Custom — Opens the Custom Descreen window, which allows
you to specify a custom line screen value. Refer to the Using
Custom Descreen Settings section for information to set custom
descreen values.