Phase-space trajectories built from our best-model predictions in Fig. 3, in the same selected intervals. We compare RV with (a, b) FWHM, (c, d) the time derivative of FWHM, (e, f) S-index, and (g, h) the time derivative of S-index. Time runs from blue to yellow, as defined by the colour bars on the right-hand side. The same colour bars contain the temporal location of ESPRESSO18 (circles) and ESPRESSO19 (squares) measurements. Every trajectory comes with a mark at the bottom right that guides the direction of evolution, as well as the median model uncertainty in each dimension.