Gravity échelle diagrams of the two RGB stars KIC 5858947 and 11550492. The x-axis is the period 1/ν modulo the gravity spacing ΔΠ₁; for clarity, the range has been extended from  − 0.5 to 1.5 ΔΠ₁. The size of the selected observed mixed modes (red diamonds) indicates their height. Plusses give the expected location of the mixed modes, with m = −1 in light blue, m = 0 in green and m = +1 in dark blue.