The Search Commands field 
at the bottom of the File
menu is useful for selecting commands when the user does not know where
the command is located. Begin typing in the Search
Commands field, and the File
menu commands will be replaced by a list of commands or ribbon bar sections
that contain the text.
For example, type "do" into the Search Commands field and the Undo and Redo commands are among the list. Also, the Home | Undo and View | Window ribbon sections are shown on the list. Click a command to use it. Or click a command section, like Window, to view all of the commands contained in that section of the ribbon bar.