Jazz musicians typically use chromatics in the following
manner: Between the root and the second, between the fifth and the sixth, and
between the root and the seventh.
As I have said you can play any note over a given chord as
long as you do it right. To sum up the use of notes outside the key Jazz
musicians employ surrounds (see lesson six), chord substitutes (see previous
post just below) and the above discussed use of chromatics.
