Echelle diagrams for our five stars, shown in the top and bottom panels, along with the leftmost middle panel. These diagrams show the oscillation frequencies as a function of the same modulo of the frequencies and the large frequency separation, Δν₀, which separates modes of different ℓ-value and hence allows for mode identification. The x-axis has in each case been shifted by a constant to place modes of ℓ = 0, 2 on the left side of the diagrams and modes of ℓ = 1 on the right side. Modes of ℓ = 0 are shown as filled circles, ℓ = 1 as diamonds, ℓ = 2 as triangles, and possible ℓ = 3-modes are shown as crosses (upper-left panel only). The frequencies of maximum power (ν_max) are indicated as short horizontal lines near the y-axes and the large frequency separations (Δν₀) as vertical dashed lines. The middle panels illustrate the relation between the échelle diagram and the power spectrum: in the échelle diagram for KIC 8395903 (middle-left) the horizontal dashed lines indicate the frequency region of the power spectrum shown in the middle-right panel, with the ℓ-values of the oscillation frequencies written at the top of each panel.