Model spectrum at 300 days (SN 2011fe with the added Hα line) is shown in magenta overlaid on a rest-frame spectrum of SN 2015cp at 694 days in grey. The model flux has been scaled to the distance of SN 2015cp for comparison. The green, orange, and red shaded regions are the bandwidths of the g-, r-, and i-bands, respectively. The transmission profiles are plotted in the same colours for each band. The model is also shown shifted to z = 0.07 (and offset up in flux), where the Hα line has just started to be in the i-band.