Research preview. Download buttons export exactly the bars currently displayed (including sorting and top-20 filtering), with original expression units in the CSV. Siletti is summarized by original superclusters using cell-count-weighted means of log-transformed expression; the full 461-population atlas remains unchanged. DropViz now uses cell-type means from the newly uploaded source matrix (40 core BPS genes only). Expression values are shown on separate scales for each dataset; do not compare absolute values between studies. This is a new gene-explorer concept and does not modify any approved heatmaps.