I am trying to adjust the righthand margin for page numbers (in header in this case) in Word 2007. I have scoured the help screens and Google and all I get is how to change margins for pages or how to set the top margins for headers -- nothing about adjusting right or lefthand margins for page numbers.

One screen said to go to Page Layout >Breaks >Section >Next Page > but then it's greyed out. (And why would that be a place to go for this issue is beyond me). Anyway, thanks in advance for some advice!