Galaxies classified as having tidal features or a satellite plane in the λ_Re − ϵ_e plane in the MATLAS survey (top row) and in Magneticum Box4 (bottom row). Only the ETGs and intermediate-type galaxies are shown for the simulated sample. The colored data points represent galaxies with the respective feature. The large gray dots were classified as lacking the respective feature, and small gray dots were not classified (only the case for the observed satellite planes). The values of λ_Re and ϵ_e were determined at one effective radius for the observations and at one half-mass radius for the simulations. For the simulations, they were determined in the edge-on projection. The solid black lines indicate the border between fast and slow rotators (Emsellem et al. 2011), with fast rotators lying above the border. The measurements of shells, streams, and tails of MATLAS galaxies are taken from Bílek et al. (2020) and the measurements of the planes are taken from Heesters et al. (2021).