Only that scanimage’s manpages talk about -x and ^-y ^ parameterswith the caveat that the device has to support it. Also: -l (top-left x position of scanned area), and possibly -t (y posiiton) PS: All values in millimeters PPS: Did a quick test. At least my scanner works with scanimage -l 50 -t 50 -x 100 -y 100 > test.pnm