The pane to the left of the editor pane shows the structural outline of your LaTeX project, updated every time you save or typeset the file.

Clicking on these tags will jump to the corresponding position in the source code, and if your distribution supports SyncTeX, the PDF output.

The menu bar in the Outline View contains a 'Settings' button on the left. The menu attached to that button may be used to customise the level detail you wish to see in the Outline as shown below.

The menu bar in the Outline View contains a Settings button on the left which may be used to customise the level detail you wish to see in the Outline. The arrows on the right help move back and forth between different points in the code that you've visited. It is particularly useful when moving around between different files, to edit them or to jump from the Error Log.