A method for detecting misalignment in a system comprising a printer and a folding apparatus arranged to fold recording media sheets output from the printer, the method comprising: receiving, at the printer, a request to print a calibration pattern on a recording medium; in response to the request, printing an image of the calibration pattern on a recording medium sheet, wherein the calibration pattern includes graduated measurement scales positioned so that: when the calibration pattern is printed without misalignment on a recording medium sheet of predetermined dimensions, matching graduations of plural measurement scales in the calibration pattern are printed at respective reference locations on the recording medium sheet that correspond to corners of the recording medium sheet or to spaced positions along a line where folding of the recording medium sheet by the folding apparatus is scheduled, when the calibration pattern is printed with misalignment on a recording medium sheet of predetermined dimensions, non-matching graduations of said plural measurement scales are printed at the reference locations on the recording medium sheet; determining which graduations of corresponding measurement scales in the calibration pattern are in registration at the reference location; and performing corrective adjustments in the printer to adjust the relative position between the printer and recording media sheets in translation and/or rotation or between the printer and folding apparatus to adjust the alignment of the printer and folding apparatus , based on the graduations of the measurement scales . receiving, at the printer, a request to print a calibration pattern on a recording medium; in response to the request, printing an image of the calibration pattern on a recording medium sheet, wherein the calibration pattern includes graduated measurement scales positioned so that: when the calibration pattern is printed without misalignment on a recording medium sheet of predetermined dimensions, matching graduations of plural measurement scales in the calibration pattern are printed at respective reference locations on the recording medium sheet that correspond to corners of the recording medium sheet or to spaced positions along a line where folding of the recording medium sheet by the folding apparatus is scheduled, when the calibration pattern is printed with misalignment on a recording medium sheet of predetermined dimensions, non-matching graduations of said plural measurement scales are printed at the reference locations on the recording medium sheet; when the calibration pattern is printed without misalignment on a recording medium sheet of predetermined dimensions, matching graduations of plural measurement scales in the calibration pattern are printed at respective reference locations on the recording medium sheet that correspond to corners of the recording medium sheet or to spaced positions along a line where folding of the recording medium sheet by the folding apparatus is scheduled, when the calibration pattern is printed with misalignment on a recording medium sheet of predetermined dimensions, non-matching graduations of said plural measurement scales are printed at the reference locations on the recording medium sheet; determining which graduations of corresponding measurement scales in the calibration pattern are in registration at the reference location; and performing corrective adjustments in the printer to adjust the relative position between the printer and recording media sheets in translation and/or rotation or between the printer and folding apparatus to adjust the alignment of the printer and folding apparatus , based on the graduations of the measurement scales . <EOS>