Click the TOOLS button in the top, right corner.
Centering is the top right of this screen.
If you are using an ink jet printer, change the MOVE LEFT/RIGHT to -75 (negative 75), Most laser printers should stay at 0.
NOTE: The SORT ORDER on most laser printers is NORMAL. Most inkjet printers should be changed to REVERSE. This will change which page numbers print on back. For instance, page 3 should be on one side and page 4 should be on the back of this same page. If this is wrong (and your centering is correct), try a different sort order. Centering is key here. If your centering is off, your sort order could be right but look wrong.
Click OK at the bottom of the screen to save your settings.