Preferred direction of the variance asymmetry in the Planck PR4 CMB temperature maps. Dipoles are computed from the position-dependent variance maps computed using HEALPix pixel patches. The data dipole directions are given by the large blue crosses and orange disks for Commander and SEVEM, respectively, and the small markers are for the corresponding simulations. The blue and orange lines are the planes orthogonal to these observed dipoles. The solid, dashed and dash-dotted lines correspond to the galactic, ecliptic and supergalactic planes, respectively.