How to make bitrix subcategories correctly?

Question

1C-Bitrix

Good afternoon, I have a category structure in the infoblock:
in brackets - a symbolic code

Проекты
-Первый (first)
--Вложенный (first-child)
-Второй(second)
-Третий(third)

All this is displayed news.list on the page "/projects"
And as a result, the following url is obtained /
projects/first
/projects/first-child - And here we need nesting - /projects/first/first-child
was it like that?
Page address management settings:
Section page: #SECTION_CODE#/
Detailed view page: #SECTION_CODE#/#ELEMENT_CODE#/
The whole point of the question:
How to make a subcategory correctly so that its url is not from the project root, but from its parent
Please tell me

Answer 1

Instead of section code - section code path

Answer 2

#SECTION_CODE# replace with #SECTION_CODE_PATH#