Outline is a [[Core plugins|core plugin]] that shows all the headings in the current note with the goal of making it easier to see the note's structure. It is enabled by default. Outline shows everything that is a [[obsidian-playbook/Using Obsidian/02 Making Notes in Obsidian/Markdown#Headings|Markdown heading]] (`#`, `##`, `###`, and so on), and you can click on any of them to jump to that section. Outline is a good way of navigating a long document.