Cover legend: Two superimposed focal planes of a flat-mounted retina from an adult mouse heterozygous for activated leukocyte cell adhesion molecule (ALCAM) that also harbored a transgene expressing YFP in retinal ganglion cells (RGCs) and amacrine cells. Cells within the RGC layer are shown in green, and those within the amacrine cell layer have been pseudocolored purple. For more information, see the article by Buhusi et al. in this issue (pages 15630–15641).