From top to bottom: Power spectra of the normalized cross-helicity, σ_C, normalized residual energy, σ_R, and magnetic compressibility, C_B, corresponding respectively to PSP (blue), Solar Orbiter (red) and Wind (green) intervals identified in cyan in Figs. 4, 5 and 7. The cyan line in the bottom panel is the power spectrum of the magnetic compressibility of PSP on May 7, 2021 (see interval identified by the cyan box in Figure 6).