Extended Data Figure 4.

Example of neighbor exchanges induced in the tissue upon droplet actuation with a magnetic field. Confocal section showing the spatial arrangements of cells in the neighborhood of a magnetically-responsive droplet both in the absence of magnetic field (OFF) and after applying a magnetic field (ON) for 15 minutes (left). Several cell rearrangements are observed to be induced by droplet actuation (right). Some of the cells undergoing neighbor exchanges are colored and numbered to highlight the rearrangements. Tg(actb2:MA-Citrine) embryos were used to visualize cell membranes.