The evolution of galaxy orbital composition with redshift. The columns from left to right are all galaxies, galaxies with major mergers (mass ratio > 1:3), galaxies with minor mergers (mass ratios between 1:10–1:3), and galaxies with negligible mergers or no mergers (mass ratio < 1:10). The rows from top to bottom represent the mass fractions of cold, warm, hot+CR components as functions of the galaxy’s stellar mass within R_e. In each panel, the solid, dashed, dash-dotted, and dotted curves represent galaxies at z = 0, and their progenitors at z = 0.5, z = 1, and z = 2, respectively.