3 things were done on the altar above the red line - including libations of water and wine, and certain details of the bird olah (burnt-offering), and on the southeast corner. Also, specific directions or coordinates where the different parts of the offering must take place. Plus, a new mishnah! Specifically the details of the bird sin-offering. Including a vivid description of "melikah" of the bird - pinching the neck of the bird in such a way as to nearly separate the head from the body. And then all that blood would be placed (or dripped) on the altar. Also, a very long mishnah detailing various practices pertaining to the bird offerings, including that pinch on the neck -- and also the permutations of details that could go wrong with our without significant impact on the validity of the offering.