Pie chart showing the detectability of mixed mode (m. m.) and multiplet signatures according to our resolution criterion for 71 red giant stars using the observationally constrained stellar parameters from Mosser et al. (2017). The detectability depends on the inclination angle i. “Always detectable” means that the feature is resolved for all tested values of radial mode linewidth (i.e., 0.7 Γ₀, Γ₀, and 1.3 Γ₀). “Detectable within the uncertainties” means that the feature is resolved for at least one value of a tested radial mode linewidth. “No δν observed” corresponds to the 10 stars for which Mosser et al. (2017) did not measure a frequency shift.