Electron selection for triggered data with and without the TRD offline PID (see Section \ref{Chapterpid}) in Pb--p collisions at \mbox{\sqrtsnn = 5.02 TeV}. Electrons from photon conversions in the detector material were rejected by matching the online track with a track in the TPC. The corresponding distribution for minimum-bias data, scaled to the maximum of the distribution of the triggered data sample, is shown to visualise the TRD trigger capability to enhance electrons.