Quote Originally Posted by deselby View Post
I... there are the letters 'N' and 'S' displayed in red over some of the bars...
This is the size of the chords (Normal and Small.) Usually we use Normal, but if space is limited, then Small. The red indications (there are others) are not displayed in Song view, just when editing. To cancel, click that beat, click the X in the Chord size box.

This thread might be of interest:
http://irealb.com/forums/showthread.php?t=194