Top row: cases of transitions rejected by the selection criteria. From left to right: a crowded zone: black and blue points are pixels considered as continuum by the median filter and the median value, respectively. The sorted residuals are also plotted, where the 70% limit (black to red) is over 0.009. An asymmetrical blend: the red segments represents the wavelength difference. A symmetrical blend: the red segment shows the flux difference. Bottom row: the transmission spectrum without (left) and with (middle) the local shift correction. The stellar spectrum is shown at the top. Right: stellar line depths are generally stronger with greater oscillator strength values. Several species are plotted with different colours.