Shift + F4 is assigned to the RepeatFind command, which finds the next
word/phrase only. When you reach the end of the document, you are
presented with a message asking if you want to start again at the
beginning of the document. Pressing Enter will start the Find process
again. If you used Find to locate a word and you edited that word,
you would need to recreate a Find command to locate that edit.
There are no FindNext and FindPrevious commands. The BrowseNext and
BrowsePrevious commands are assigned to Ctrl PageUp/Down commands.
You can remove those shortcuts and assign Ctrl PageUp/Down to
GoToNextPage and GoToPreviousPage, which will automatically turn off
Find (if that was the previous command).
Pages are considered "objects" in Word. The Browse feature enables
you to navigate through your document by specific objects you can
select from the Browse Object menu (which always looks for the "next"
object). There are 12 objects that include the following: Go To,
Find, Edits, Heading, Graphic, Table, Field, Endnote, Footnote,
Comment, Section, and page.
Cheryl