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The pseudorapidity densities of charged particles and inclusive photonsproduced in high energy nuclear collisions are essential observables tocharacterise the global properties of the collisions, such as the achievedenergy density, and to provide important constraints for Monte Carlo modelcalculations. In the LHC Run 1 and Run 2 configurations, ALICE had largecoverage to measure charged particles over a pseudorapidity range($-3.4~<~\eta~<~5.0$), combining the data from the Silicon Pixel Detector (SPD)and the Forward Multiplicity Detector (FMD). The inclusive photons are measuredat forward rapidity using the Photon Multiplicity Detector (PMD), covering thepseudorapidity range $2.3~<~\eta~<~3.9$. New results on charged-particlepseudorapidity densities measured in pp, p$-$Pb, and Pb$-$Pb collisions at$\sqrt{s_{\rm NN}}$ = 5.02 TeV using Run 1 and Run 2 data are presented.Inclusive photon production is reported for p$-$Pb collisions at $\sqrt{s_{\rmNN}}$ = 5.02 TeV. The charged-particle rapidity densities are derived from themeasured charged-particle pseudorapidity densities, and then parameterized by anormal distribution. This allows us to study the evolution of the width of therapidity distributions as a function of the number of participants in all threecollision systems. The performance of the new Inner Tracking System (ITS)designed for ALICE Run 3 configuration is also discussed for pilot beam ppcollisions at $\sqrt{s}$ = 0.9 TeV.

System-size dependence of particle production at mid- and forward rapidity with ALICE