Line profiles of [O III] λλ4959,5007 and [O III] λ4363 of the emission from 0540 as observed through the VLT slit. The velocity is relative to LMC. The [O III] λλ4959,5007 profile was created from a cleaning procedure described in the text, and is for the sum of the two line components. The [O III] λ4363 is the blue-red profile in the bottom panel of Fig. 15. The flux of [O III] λ4363 has been multiplied by 28 and 34 to match the various parts of the line profiles. There is a tendency of relatively weaker [O III] λ4363 emission on the blue side, which could mean hotter [O III]-emitting plasma on the receding side of 0540 (see text).