Scatter plots of parameters at the 214 leading RD-type switchback transition regions: (a) Plasma beta variations and magnetic shear angles. The solid curve shows |Δβ| = 2(L∕λ_i) tan(α∕2) for (L∕λ_i) = 1.0. The shading indicates the switchback transition region’s normalized thickness Δx∕λ_i. The cyan stars correspond to the reconnecting leading switchback transition regions reported by Froment et al. (2021). (b) Variations in thermal and magnetic pressures. The values in each box determine the number of the RD-type transition regions in each quadrant. The color shading indicates . The gray shaded regions show where κ ⋅ ΔP_th > 0 (bad curvature). The dashed line represents the curve along which ΔP_th + ΔP_B = 0 (referred to as the total-pressure balance). (c) κ and the normalized proton speed variations. The shading indicates the average magnetic field magnitude inside the leading transition regions, |B|_Transition.