The NLFFF extrapolation of AR 11429 on 2012 March 6 23:36 UT using the CFIT method. The left panel shows the CFIT N solution, and the right panel shows the P solution. The background color map denotes the B_z component at the photosphere, with blue denoting B_z < 0 and red denoting B_z > 0. The green B_z = 0 contours indicate the main PILs. The field lines are colored by the magnitude of the current density J.