Evolving morphology of the magnetic reconnection. (a) Evolution of the height of the reconnection X-point derived from the loop connecting positions P4 and N16. (b) Shear angle derived from the E_c evolution of positions P4 and N16. (c) Shear angle derived from EUV observations (from Fig. 10 of Su et al. 2006). (d) Axonometric projection cartoon of the time evolution of the presumable loop connecting positions P4 and N16 (side view).