Guide to the main features of Puppis A. We show an exposure-corrected false-color image of Puppis A in the same energy bands as in Fig. 1, created from the data set taken in May 2021, with an inset highlighting the location and shape of the bullet-like feature. The numbers label the following characteristic features of Puppis A discussed in the text: (1) CCO, (2) BEK (see Hwang et al. 2005), (3) northeast filament (Katsuda et al. 2010), (4) ejecta knot (Katsuda et al. 2008), (5) ejecta-rich region (Hwang et al. 2008), (6) northeast rim, (7) western arc, (8) faint southeast, (9) southern hole (Dubner et al. 2013).