PHOTO_GRAYSCALE constant
PrintJobOutputType
const PHOTO_GRAYSCALE
Specifies that the printed content is a grayscale image. Set the output type to this value when your printable content contains no color—for example, it’s black text only. The default paper is Letter/A4. Output is high quality grayscale, duplex.
Implementation
static const PHOTO_GRAYSCALE = PrintJobOutputType._internal(3, 3);