Proceed to Operations > Message Center > Log Entries tab. Double click on the desired Log Book Entry to add a new comment.
Click Add Comment at the bottom.
Enter the comment into the box provided. When finished, click Send to add the comment to the Log Book Entry and send a message to all colleagues to notify them that there is a new message to view.
The main Log Entries tab will now show there are (2) comments for this one Log Book Entry.