Maj7 Full Voicing

R – 7 – 3 – 5

Prove it — just do the practice exercise.
CMaj7 Full Voicing
C (R)B (7)E (3)G (5)
The Full Voicing arranges all 4 notes in jazz-typical order:

Root on bottom
7th above
3rd in the middle
5th on top

Full and warm sound. The 7th right above the root creates a tight half step.

Example: CMaj7 Full = C + B + E + G