Actor Editor Context is an Editor feature that you can use to set a Level, Data Layer, Level Instance, or Outliner Actor Folder as the current editor context. When set to current, any Actors you add to the Viewport are assigned to the current context. Assigning a current Actor Editor Context helps keep your world organized when adding a large number of Actors by assigning them to a specified context automatically, such as keeping all the trees in an environment in a Trees Outliner folder and assigning them to a Trees Data Layer.