While playing as a Medic, select the Medkit/Defibrillator Set ('5' key on your keyboard for a Medkit, press it twice for Defibrillators) and click the LMB while facing injured/fallen teammates to heal/revive them, or RMB to heal yourself.
While playing as an Engineer, select the Armor Set ('5' key on your keyboard) and click the LMB while facing teammates with damaged armor to repair it, or RMB to repair your own armor.
While playing as a Rifleman, select the Ammo Pack ('5' key on your keyboard) and click the LMB while facing teammates with low/no ammunition to replenish it, or RMB to restore your own ammunition.
