--quiet,-q be quiet
--help,-h print this text
--verbose,-v be verbose
--version,-V print binary version
--device=x,-d use this device (default: /dev/pccl)
--left=x,-X left edge of image area (default: 0)
--top=x,-Y top edge of image area (default: 0)
--width=x,-W width of image area (default: 256)
--height=x,-H height of image area (default: 240)
--mode=x,-M pixel mode (0:15-bit, 1:24-bit, default:0)
