LUT /BLANK

        The blanking color is used to paint blanked pixels in images. By de-
    fault at startup this color is white. This can be customized with
        LUT /BLANK Color
    where  the  color  is one of the supported pen colors (type LUT /BLANK ?
    for the complete list). The 2 most relevant values  are  BACKGROUND  and
    FOREGROUND  which  translate  as  WHITE or BLACK depending on the device
    color.

    For a custom blanking color, use command LUT LUT (see subtopic  for  de-
    tails).