add separately text or whatever after heading stile chapter

[Zhibek]

Hello they are!


I need add separately text or whatever after heading stile chapter. How can do it?
I attached file
There are 3 chapters

• Chapter 1 (in heading 1 style)
• Chapter 2 (in heading 1 style)
• Chapter 3 (in heading 1 style)

In each chapter there are 'arrow' appears when hover cursor over a paragraph to which a heading style has been applied, so it expand/collapse the text.

But whatever I add or type after heading style chapter it related to applied chapter.
So how can just add separately text?(without connection to chapter)