If x-y coordinates are to be used, the upper left corner coordinates should be identified as '-1, +1'.
Regards, John. Julian Vrieslander wrote: --snip > > I'm not sure that I understand your explanation above. In an earlier > message you said that (-1, -1) would be used for the upper left corner. > Suppose I select "Device | Rotate left" and "Device | Mirror." Now, when > I look at VueScan's screen display, is (-1, -1) now the lower right > corner, or still the upper left? That is, does the coordinate system > rotate, flip and mirror with the image, or is it fixed to the VueScan > display window? --snip--
