From one quarter tag formation: Assuming "regular" couples in a right hand wave in the center. Boy on end of wave walks forward around the spot where the outside girl was standing and takes the place of the man who was originally outside. The outside man walks forward to become a new end of the center wave. The girl in the center wave walks forward to the spot where the outside man was (her move is an "Extend the Tag") and immediately "Circulates" to take the position of the original outside girl. This whole move can also be described as "All Extend the Tag twice, then outsides do a Partner Trade." Finishes in one quarter tag formation.