Cover legend: The image shows the close association between the processes of retinal microglia and presynaptic and postsynaptic structures in the retina. GFP-expressing microglia (green) located in the outer plexiform layer of the retina of a 2-month-old adult CX3CR1^GFP/+ transgenic mouse are in close physical contact with presynaptic axon endings from cone photoreceptors labelled with cone arrestin (red) and postsynaptic rod bipolar dendrites labelled with PKCα (blue). For more information, see the article by Wang, Zhao, et al. (pages 2827–2842).