Watch the C Form: Trill Exercise online guitar lesson by Dave Celentano from CAGED Commander
This exercise uses 'trills' to highlight chord tones. Since a trill is produced by two alternating notes on the same string we'll need to relocate a few of the notes to make it work. For instance, the second note in the exercise (17th fret/A string) is relocated from it's original home (12th fret/D string). Another relocated note is the 17th fret/high E string which is borrowed from the 'A form' pattern (in the next section of this course). See if you can spot any other notes that aren't in the 'C form' scale pattern.