Microsoft Word for Mac page number
Press Opt
+F9
(or Fn
+Opt
+F9
) to toggle display of Field Codes
From my webpage: The Function Keys and Keyboard Shortcuts That Manipulate Fields
Shift
+F9
is also a toggle shortcut, but it is a temporary one.
Opt
+F9
changes your system preferences. If the document is opening with { PAGE } displayed, you need the system preferences changed.