Photometric variability as a function of stellar properties. Left: photometric variability, R_var, against GaiaG magnitude based on light curve amplitudes in the V filter with 120 s exposures. Rotators are shown with filled, other members of NGC 2281 with unfilled symbols. Candidate binaries are marked with squares. Small grey symbols show the field stars. We note that all rotators are well above the noise level. Right: corresponding rotation-variability diagram showing the rotators from the left panel. Saturated fast rotators are found among the large amplitude stars, whereas slower unsaturated rotators form a sequence of decreasing activity with increasing Rossby number.