Quote:
addPage(target:Object, [printArea:Object], [options:Object], [frameNum:Number])
If you passed a value for printArea, the xMin and yMin coordinates map to the upper left corner (0,0 coordinates) of the printable area on the page. The user's printable area is described by the read-only pageHeight and pageWidth properties set by PrintJob.start(). Because the printout aligns with the upper left corner of the printable area on the page, the printout is clipped to the right and/or bottom if the area defined in printArea is bigger than the printable area on the page. If you haven't passed a value for printArea and the Stage is larger than the printable area, the same type of clipping takes place.