The Compresstome® has been widely used by researchers worldwide for making precision-cut lung slices (PCLS). The Compresstome® uses agarose embedding prior to slicing to allow for the preservation of open alveoli and better tissue compliance. The video above shows Compresstome® sectioning PCLS for immunostaining to visualize the localization of various immune cell types in the lung. This protocol can be extended to visualize the location and function of many different cell types under a variety of conditions.