Overview of the observations. The panels from left to right are: Ba ii 4554 Å continuum intensity in units of its spatially averaged value; mask applied to locate granules and intergranular lanes; Ba ii 4554 Å line center intensity in units of its spatially averaged value; magnetic field strength from the inversion of Fe i IR lines. Contours (same in all panels) mark the locations of granular areas with the magnetic field above 1.2 kG.