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I have tried boxtops suggestion of changing the spacing to zero but unfort it didnt make a difference.
I have opened a new doc and added a page border. I printed it twice, once by clicking on the A4 option and once by clicking the default 'no scaling' option. Both times all 4 sides printed although the box was closer to the top and right of the page than the bottom or left.
It is frustrating but I think I can live with the box being off centre rather than the bottom being chopped off!