Composite images of our strong ($f_{\mathrm{esc}}^{\mathrm{LyC}}>4\%$, top row) and non and weak ($f_{\mathrm{esc}}^{\mathrm{LyC}}<4\%$, middle row) LyC leakers observed with KCWI (see Sect. 4.3). The UV continuum, Mg II and [O II] mean stacks are shown from left to right, respectively. The contours are spaced logarithmically by 0.2 dex, with the lowest contour level always at 4 × 10⁻¹⁸ erg s⁻¹ cm⁻² arcsec⁻². The bottom row compares the continuum (left), Mg II (middle) and [O II] (right) radial SB profiles of the two subsets composites images. In each bottom panels, the lighter (darker) colored profiles with square (circle) symbols correspond to the strong (non/weak) LyC leaker subsample. The full and empty markers show the profiles of the median and mean composite images, respectively. The dotted lines correspond to the SB profiles of the median stacked PSF images of the different subsamples. The dashed lines show the 2σ significance levels.