Insert child (menu) for toolbars

[karelt]

Hi,

is there anywhere a description of the following, pls?

Toolbar/Tools/Customize.../Commands/Tree/...
Insert child (menu) *)
[Insert Template] (for prev menu)
Insert Sibling (menu) *)
[Insert Template] (for prev menu)

*) These are probably the buttons that appear in the default Tree toolbar under the same names.

After placing these menus into a toolbar I have not found a way to insert anything to these menus.

There are also keyboard shortcuts under Tree:
Insert Child | [Insert Template]
Insert Sibling | [Insert Template]
...and I assume these refer to the item(s) on the menu that can be created using the Tree/Insert child (menu) and Insert Sibling (menu).

Haven't found any description though.

Any advice, pls?
Many thanks in advance!

K