Run attached application.

click button "Hierarchical order"
click button "Init" - initial stage of hierarchy will appear.
click "App" in appeared stage. That created application modal stage as child of the last stage.
in appeared stage "stage1" uncheck checkBox "create new with this as parent."
click "none" that creates new stage with none modality and "free" (without parent).
and this none-modal "stage2" is always under "stage1"