I was printing documents and I notice problems with the margin when I print. The top margin becomes too long compared to what I have set. I checked the printer options and changed some settings but nothing changed. Then I found the solution.
1. Go to Printer Properties (for Office 2010).
2. On Quick Setup (the first tab), look for printer paper size.
3. Change the size to what you need. In my case it was set to A4 then I changed it to Letter 8.5x11.
4. Click "Apply" button to apply changes.
Step number 4 is important because before, though I changed settings, I never clicked Apply, instead, I just clicked Okay which didn't really apply the changes I have set.
So there you go. I hope this helps.