To rename a bookmark, follow these steps:
1.On the Insert tab, click
Bookmark.
2.In the Bookmarks window, place the cursor over the bookmark that you want to rename and click
Edit bookmark.

3.Edit the bookmark title and press Enter. If necessary, you can undo or redo the action of editing a bookmark using standard methods.
4.Close the Bookmarks window. To do this, click Close or
in the window title.