Konica Minolta bizhub 421 - Manual (Page 216)

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User mode settings 8
8.3.5 Scan/Fax Settings
Black Compression Level
Specify the coding mode ability for black-and-white image transmission.
- MH: The data size becomes large.
- MMR (Default): The data size becomes small.
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Detail
Saved MMR-compressed data may not be opened on a computer depending on the application.
Default Scan/Fax Settings
Specify the default settings (settings selected when the [Reset] key is pressed) for the Fax/Scan mode.