9 major chords
The ninth major (maj9) chord should not be confused with the dominant 9th chord. If we compare Cmaj9 with C9 we could see that the notes changes from C, D, E, B to C, D, E, Bb. It's a relatively uncommon chord, which is probably most used in jazz arrangements. Below you could see this chord played in different tones with a movable shape.
Notice that the chord has some similarities with the 7#9 chord, just two fingers are changing positions.
Since some of the chords above are high up the fretboard and in some situations less suitable, some compliment to maj9 chords in open positions are presented below.
Suggestions of chord sequences to try with this chord type:
Dm9 - G13 - Cmaj9
Em - Dmaj9 - Asus2 - Cadd9
Open major 9 chords
Notice that Fmaj9 has a shape similar to C major in open position.
More examples of progressions including major 9th:
C - Fmaj9 - G6