First post (and I really have looked everywhere before submitting myself to this question).
How does one go about the right-hand in page navigation, seen throughout these pages...
Introduction to SharePoint - SharePoint in Microsoft 365 | Microsoft Docs
...as the "In this article" navigation?
I'm assuming it's some kind of web-part, that is able to pick up on Heading styles in the Text web part that carries the body of text for each page.
And for a bonus point, can I this section to pick up two levels of Heading Style?
Any help or guidance would be much appreciated.