Select the number of significant bits per pixel (BPP) to use when capturing an image.
Select 1 BPP for a black and white image, 4 BPP to assign 1 of 16 levels of grey to each pixel, or 8 BPP to assign 1 of 256 levels of grey to each pixel.
The scanner ignores these settings for JPEG file formats, which only support 8 BPP.
