You can create, view, and edit notes for each track in the Track Notes pane.
Track Text area: View and edit notes for the selected track in the Track Text area.
Track Text Edit button: Use to add or edit track-specific text in the Track Text area. You can also double-click the Track Text area.
Do one of the following:
Click the Note Pads button 
in the control bar, then click Track.
Choose View > Show Note Pads, then click Track.
For more information about track notes, see Add track notes