For Major and Perfect Intervals:
 

          do ↑                             d          r           m         f           s           l           t           d

                                              └─M2┘

          └───M3──┘

          └─────P4─────┘

          └────────P5──────┘

          └───────────M6───────┘

          └───────────────M7───────┘

          └────────────────────P8──────┘

 

For Minor and Perfect Intervals:
 

          do ↓                             d          r           m         f           s           l           t           d

                                                                                                                      └m2─┘

           └──m3───┘

            └───P4──────┘

          └─────P5─────────┘

          └─────m6─────────────┘

           └─────m7─────────────────┘

          └────P8───────────────────────┘

For the Tritone (a special interval):
 

          fa ↕  ti                         d          r           m         f           s           l           t           d

          └─────∆──────┘