https://youtu.be/BVezsIh35yY
- load a world
- create a new subscene of this world
- save it
- Plugins > Game Mode Setup
- set to `"{0758DAF750289224}Configs/Workbench/GameModeSetup/ScenarioFramework.conf"`, click **Next**
- click **Scan World**
- it will warn about missing entities, click **Next** then **Create entities** to create them
- click **Next**, then **Skip**
- notice that `GameMode_Editor_Full.et` has been created in the current layer