Mode height and amplitude as a function of the mode order for the 23 stars with their colour identified by their effective temperature (as in Fig. 3), for the 4 sub-giant stars of Benomar et al. (2013) (dashed lines), and for the solar LOI data (solid black line). The relative 1-σ error bars for mode height are similar to those of the mode linewidth, while they are typically 3 times smaller for mode amplitude.