Stretched period échelle diagram for KIC 7458743 obtained from 4-yr Kepler time series. Only peaks with an S/N above eight are shown. The size of the symbols are proportional to the peak amplitude. For clarity, peaks in the vicinity of l = 0 and l = 2 modes are omitted. The échelle diagram is folded with an apparent period spacing of ΔΠ₁^meas = 76.5 s, which produces the best visual alignment of the ridges.