This plugin adds a widget with a Table Of Contents for the current page. It can be either in the side pane or "floating" on top of the page. The Table Of Contents gives an outline of all headings in the page, and allows modifying this outline (try the context menu).
Dependencies: This plugin has no additional dependencies.
The option Position in the window determines in which side pane the table is shown.
Alternatively if the option Show ToC as floating widget instead of in sidepane is enabled the table is shown on top of the page view.