Watch the Chord Extensions Pt. 4 online guitar lesson by Brad Carlton from Guitar Lab: The Imaj7 IVm6 Progression
In this lesson, I'll demonstrate adding the 11(4) to each of the chords. There are two ways to locate the 11: It will always be a half step higher than the 3 and a whole step lower than the 5 when referencing a major chord, and it will always be a whole step higher than the b3 and a whole step lower than the 5 when referencing a minor chord. Knowing this enables you to take any chord voicing and modify it to include the 11.