A quick tutorial.
Each trigger has two parameters you must fill :
Zone scene : The scene to load and unload, it must be a PackedScene object
Zone Position : position where the scene will be placed relative to the parent of trigger (that should be your current scene)
In the screenshot below the scene will be positioned relative to the "level1" scene node.
The trigger component has two sub components named "loading" and "unloading"
Each one is an Area component to detect when the player enter their collision volume.
Green color volume, when the player enters it's volume it loads the packed scene
Red color volume , when the player enters it's volume it unloads the packed scene
You can select the "loading" and "unloading" node and move, rotate or scale them to fit your level.
