Grouped star formation: mass of group (first row), mass fraction of stars born in groups (second row), activity time (third row), and volume of groups (fourth row) for F3000HD (blue) and MW3000HD (red) in the Galactic centre (≤2.5 kpc, left column), inner region (≤5 kpc, middle column), and disc (>5 kpc, right column). Vertical lines indicate median values, which are written out at the upper left or right. Faint lines indicate distributions and medians for a min_cluster_size of three (dashed) and seven (dotted). The corresponding median values are given in brackets.