ALMA dust continuum emission at each epoch, sorted by observation date. SB and LB correspond to the short-baseline and long-baseline observations, respectively. The angular resolution is represented by the white ellipse at the bottom-left corner of each panel. The scale bar is 10 au at the distance of the source. The orbit of the system from Allen et al. (2017) is shown as a dotted line in panel b for reference. DF Tau A is at the center of the image, while DF Tau B is to the lower left.