Absorption, Projection, and Expansion name the zonule work of the cone. Shri Gurudev Mahendranath set them in The Londinium Temple Strain. The Natha sits inside a circle and forms a cone of energy. Mind projections sent outside the cone are expansion. Those drawn in are absorption. Projection is either, or both, and is the direction of will.
Within the International Nath Order this is a working triad, not a set of keywords like Sama, Samarasa, and Sahaja, and not the faculties of Insight, Intuition, and Imagination. In the Dragon Seat letter Sri Kapilnath gives the order of the work: first absorb the Shakti in the zonule, then expand it beyond the body by will, then project it toward people, things, and ideas. The three are how the cone is used. They are not grades.