Transverse-momentum spectra of deuterons (top) and anti-deuterons (bottom) measured in pp collisions at $\sqrt{s} = $13 TeV in different multiplicity classes (circles) and in INEL$>$0 events (squares). The mean charged-particle multiplicity for classes I and X are reported in the figures and all the values for the multiplicity classes can be found in Table \ref{tab:yields}. For the analyses in multiplicity classes, the multiplicity increases moving from the bottom of the figure upwards. The statistical uncertainties are represented by vertical bars while the systematic uncertainties are represented by boxes. The dashed lines are individual fits with a L\'evy-Tsallis function .