Square of the horizontal displacement, scaled by r²ρ, for dipole modes with indicated radial order of the reference model. This reflects the energy density of the mode per unit radial distance, as a rough measure of the sensitivity of the mode to the structure. The modes which are in the dip of the period-spacing pattern (solid lines) have a much higher amplitude in the peak of the buoyancy frequency than those not in the dips of the period-spacing pattern (dashed lines). The squared buoyancy frequency is shown as a blue dash-dotted line.