Atmospheric stratification of two selected pixels extracted from area B from the simulations. Pixel (a) (top row) corresponds to an example of a low magnetic field and is located at (x, y) = (0.53″, 0.13″) in Fig. 5. Pixel (b) (bottom row) is located at (x, y) = (0.86″, 0.53″) and represents a pixel with a strong magnetic field. The solid black (red) line depicts the simulations (inversions). The sensitivity of the spectral lines resides mainly between the optical depths marked by the dashed vertical lines.