Fractional polarization profiles obtained in the presence of a horizontal magnetic field with χ_B = 60°. The upper panel shows the whole pattern without continuum, and the bottom panels indicate the line-core profiles with continuum. The pattern varies with the magnetic field of 0 G (solid lines), 0.005 G (dotted lines), 0.01 G (dashed lines), 0.1 G (dot-dashed lines), and 1 G (triple-dot-dashed lines). The anisotropy factors are the same as those resulting in Fig. 1.