Example of improved performance of the new ZAP version. The top, middle and bottom rows display respectively the non-zapped, old zapped, and new zapped spectra of an [O II] emitter in the MXDF. From left to right, the columns display: the full spectral range, the red part of the spectra, the [O II]λλ3726,3729 emission lines and the difference with the no ZAP spectrum. Flux units are 10⁻²⁰ erg s⁻¹ cm⁻² Å⁻¹.