Variability of the Ti ii, Cr ii, Mn ii, Fe ii, and Y ii LSD profiles. The ion and the number of lines used for constructing mean profiles are indicated on top. The spectra corresponding to different observing nights are offset vertically. The upper panel in each column shows residual profile variation, while the bottom panel compares the time-averaged (thin red line) and time-resolved (thick black lines) LSD profiles. The vertical dashed line shows the mean stellar radial velocity.