r-band DECaLS image (top) scaled with an inverse hyperbolic sine (arcsinh) scaling with surface brightness contours overlaid in white (units of r-band magnitude arcsec⁻²), and unsharp masked image created with a Gaussian smoothing kernel of width σ = 7 − 20 pixels (bottom). Galaxy names marked with a ⋆ are considered to host a boxy-peanut central structure in this work. The orientation of galaxies here, and throughout, is the same as in Fig. 1.