I created a new C project from existing source files. NetBeans' navigator window is empty (NetBeans 8.2). See illustration below.
According to the section 'Using the Navigator Window' in this NetBeans tutorial,
The Navigator window provides a compact view of the file that is currently selected, and simplifies navigation between different parts of the file.
The tutorial gives this screenshot as an illustration:
Correspondingly, I'd expect my Navigator window to list the names of the functions and variables defined in the currently selected file.
Any ideas what's wrong, and how it can be fixed?