Summary of the effects of departures from LTE for H⁻ on the visual continuum, roughly 400-800 nm, across the grid of models. For each T_eff, log 𝑔 combination, the results are shown for four [Fe/H] each slightly offset in the vertical direction such that the highest metallicity is highest in the plot. For each case, a circle marks the position of no change, and then an asterisk displaced in the horizontal direction gives the maximum change in the continuum relative to LTE. The scale is shown in the upper left corner, and the position of a −1% change is marked in each case with a dashed red line. For example, for the case given in Fig. 5, T_eff = 7000 K, log 𝑔 = 4.0, and [Fe/H] = 0, the uppermost line in this group shows a relative change of just below −1 %, as shown in the lower panel of Fig. 5.