In my experience, Word has never worked that way. For me, every version of Word has failed to print any content placed in the non-printing area of the page.

On the other hand, if I convert the Word document to a PDF, the output can go right to the edge of the page and when I output the PDF to a printer, there is a checkbox in the print dialog that allows me to scale the entire page to the printable area. This checkbox is usually on be default so pages scale down to fit the printable area unless I specifically uncheck it.

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Andrew Lockton
Chrysalis Design, Melbourne Australia