To the right of the Ribbon there are a few more buttons:  

•  displays the Note Revisions for that particular note, on the old layout only.
•  offers commands for the note or its subtree, such as import, export, viewing the Note source code or Attachments.
• On the New Layout, the button area is populated by some more buttons that are specific to the current note. For example, for Image and File notes, the download and copy buttons were relocated there.