1) In order to review notes, you need to see this screen and then click on

2) When you see this screen, then scroll down till you see these buttons
3) Click on this button
4) You need to select a note that you wont to reply to Note_101 by clicking on on button that is on the same line.
5) Type a new note (comment on the existing note) and then click on for reviewing the note before saving it.
6) If you want to save your new note click on otherwise click on