def axd_landscape(axs):
    """
    axis dictionary for landscape pages.
    """
    return {('Low', 1): axs[0, 0], ('Low', 2): axs[0, 1], ('Low', 3): axs[0, 2], ('Low', 4): axs[0, 3],
            ('High', 1): axs[1, 0], ('High', 2): axs[1, 1], ('High', 3): axs[1, 2], ('High', 4): axs[1, 3]}