UMAX Technologies Astra 2000U - Manual (Page 48)

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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 that follows for information
about how to set custom descreen values.
Using Custom Descreen Settings
You can also specify custom descreen settings that you can use
when you want to change the lines per inch setting to eliminate
patterns that are generated while scanning printed images. You can
enter custom settings that range from 35 to 400 lines per inch. To
define the custom descreen settings:
1. Choose the Custom… option from the Descreen drop down
menu. The Custom Descreen window opens.
2. Enter the desired lines per inch setting (between 35 and 400 lpi)
in the Custom descreen lpi #1 text box.
3. Repeat step 2 to define the Custom descreen #2 and Custom
descreen #3 settings.
4. Click OK. The settings you defined appear on the Descreen
setting drop down menu, under the Custom heading.
Changing the Filter Setting
Image filters are used to soften or sharpen edges and boundaries of
an image.