Navigation within joomla sections?

Question

Joomla

Guys, tell me who is engaged in joomla.
How to create such a menu joxi.ru/krDG89gUQXepAp Not in terms of layout, but structure?
The fact is that the category "technical technical support" has subcategories:
Technical technical support,
demos, demos
,
etc.
But I'm interested in sub-items of the "technical technical support" category. It has LINKS to other sections. How can I do the same?
I have already tried everything, I don’t know how to display it (( Tell me guys, I really need it!

Answer 1

I think so:
if there are no issues with the layout, then through the menu manager. In the column "Parent element" you set "Technical support" and you prescribe subparagraphs.