Transformation menu language : How to understand work principles?

Good evening.
I would like to understand how new "Transformation menu language" works and I ask some help.

Input data:
I have three types of node: Parent, Child, Interface + BaseConcept concept.
I would like to change matching text and/or description of substitution menu for all of concepts.
But I don't understand how to do with even with help of user documentation.

Documentation link:
https://www.jetbrains.com/help/mps/transformation-menu-language.html#substitutemenu(default)

As I understand, there are some statements:
1) Default substitutions menus should has effect on ALL child concepts
Quote: "It also has effect on sub-concepts of the concept, unless these sub-concepts define their own..."
Expectation: If I define "wrap substitute menu" for BaseConcept or Parent -> I can change child behavior
Actual: I still have default substitution menu.
Addition: I don't understand the difference there between "for BaseConcept" and "for Parent".

2) Default transformation menu should has effect on ALL not overridden child concepts
Quote: "If the language designer does not provide one explicitly, a transformation menu defined for the closest super-concept"
Expectation: If I define "wrap substitution menu" for BaseConcept or Parent -> I can change child behavior
Actual: I still have default substitution menu.
Addition: I don't understand the difference there between "for BaseConcept" and "for Parent".

3) Should I always include substitute menu to transformation menu?
Quote: "if you want to assign the substitute menu to a particular cell of an editor, you will need to include your substitute menu in a transformation menu, because only transformation menus can be attached to editor cells"
Expectation: If I include default substitute menu for Parent / BaseConcept something will change =)
Actual: Substitute menu is still the same

4) Can I set default substitute menu / transformation menu for all cells of particular concept?
Expectation: If I set "Default menu for Parent" i will see changes
Actual: Substitution menu is empty Oo

So I decided to ask to help me to understand how it should work and why =)

Picture of my concepts:

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