Left panel: transit light curves for all 2346 transiting Kepler planets from the Exoplanet Orbit Database (as of 1 November 2018) with R_p/R_s <  0.05 ∼ 5.4 R_⊕/R_⊙ (black lines, one per planet). The default template for TLS is shown with a red dashed line and the optional grazing planet template is shown with a black dotted line. The best-fitting box is shown as a light blue solid line for comparison. Right panel, gray histogram: reduced χ² residuals between the TLS default (median) transit template and the real transit light curves in the left panel. Open histogram: reduced χ² residuals between the box and the real transit light curves. The separation between the two histograms confirms that the TLS default transit template is a substantially better match to the observations than a box in ≳99% of the cases.