If the number is flush left, press Tab once for center, and twice for right. To go back, press Backspace until in position. Change appearance of page number. Select ...
(Reminder: Heading style elements must go in order from H1 to H2 to H3 etc.
Use MS Word's controls to link (or unlink) the Header and Footer before
To set up your running head and page number in Microsoft Word so they appear on the
On the Header & Footer Tools Design tab, in the Options group, select the
on the smiley-face icon in the upper-right corner of the Word window, ...
Microsoft Word 2007 and Microsoft Word 2010:
So the headings in a PDF (and the heading browser in the navigation pane of Word) are not in the right hierarchy
Microsoft Word display of inserting a page number into the header of a document.
See the info in Word Help, starting with: