Printer scaling

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when print pdf documents using mac os 10.4 adobe reader 8.0 or 9.0, print scaled down. apparent top bottom.

one of documents i'm printing scannable student answer sheets. students bubble answers , exams graded software scanning them. answer sheets have 6 registration marks around perimeter of page.

when page scanned, software cannot read students' marks because out of position. looks bottom registration marks half-inch far page.

i have tried printing 3 printers (2 xerox phasers & xerox workcentre networked copier) same result.

i have printed same answer sheets, same file, using reader 7.0 on windows pc , scan correctly.

i have tried using "none", "fit printable area" , "shrink printable area" page scaling in print dialog window. using "none" puts registration marks close edge, , other options put marks far edge.



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