It’s easy to add comments along the Timeline panel in Photoshop CS6. Simply position the current time indicator where the comment should appear and, from the Timeline’s flyout menu, choose Comments > Edit Timeline Comment. If the comment isn’t displayed along the top of the Timeline, choose Show > Comments Track from the Timeline’s flyout menu. A small yellow square represents the comment – double clicking the square displays the comment. You can also use the flyout to export the comments as HTML or Text.

Handy, thanks!