Cover legend: The image displays a 3D reconstruction of the basal cortical actin network of a bovine chromaffin cell that was transfected with Lifeact-GFP and imaged using structured illumination microscopy. The image was taken 6 min after stimulation with Ba²⁺, which causes secretion. In response, the cortical actin network undergoes remodeling to help with compensatory bulk endocytosis. The color-coding indicates the z-position of the imaged F-actin structures. Red hues are closer to the basal plasma membrane and blue hues are further within the cytosol. The contractile acto-myosin II rings visible in the bottom left of the cell form to help reduce the neck of budding endosomes. For more information, see the article by Gormal et al. (pages 1380–1389).