Add Property Actuator: property-driven Color/Level (epic 16) New pages Property-Actuator/Actionneur-de-Propriete document the fourth engine — paints an element's Color/Level from a reserved pilot property (ARES_Color/ARES_Lvl), attached via the existing tagging | grammar. Property-Calculation/Calcul-de-Propriete gain the LvlColor/LvlStyle/LvlWeight sources (authority on a plain geometry's level, not just a named cell) and a note that the Prop[...] wrapper is mandatory. Configuration-Variables/ Variables-de-Configuration gain the two actuator switches. Custom-Properties/ Proprietes-Personnalisees and the sidebar updated to list the new engine.