Brother MFC-6800 Manual Do Utilizador

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Settings in the Scanner Window
Image
Resolution
Choose the scanning resolution from the Resolution pop-up menu. Higher 
resolutions take more memory and transfer time, but can achieve a finer scanned 
image. 
Color Type
Black & White—Set the image Type to Black&White for text or line art. For 
photographic images, set the image type to Gray (Error diffusion) or True Gray.
Gray (Error Diffusion)—is used for documents that contain photographic 
images or graphics. (Error Diffusion is a method for creating simulated gray 
images by placing black dots in a specific matrix instead of true gray dots.)
True Gray—also is used for documents containing photographic images or 
graphics. This mode is more exact because it uses up to 256 shades of gray. It 
requires the most memory and longest transfer time.
Colors—Choose either 256 Color, which scans up to 256 colors, 24-bit color 
which scans up to 16.8 million colors. Although using 24-bit color creates an 
image with the most accurate colors, the image file will be approximately three 
times larger than a file created with 256 Color.