Position-velocity diagrams of S255IR for the ¹²CO(2 − 1) SMA-only outflow observations with a velocity resolution of 1 km s^-1. The pv-diagram is in NE-SW direction with a PA of 75° from the N (the cut is marked in Fig. 8, top-left panel). The contour levels are from 10 to 90% from the peak emission (4.2 Jy beam^-1) in steps of 10%. The v_lsr at 7.7 km s^-1 and the central position (marked by the cross in Fig. 8top-left panel) are marked by vertical and horizontal lines.