Outline view gives you a structural view of your C/C++ source code.
Outline view shows the elements in the source file in the order they occur, including functions, libraries, and variables. You may also sort the list alphabetically. If you double-click an entry in Outline view, the C/C++ Editor moves the cursor to the start of the item selected. For example, to jump to the start of main() in the C/C++ Editor, double-click main() in Outline view.