It would be great if one could define two colors for user functions, one color for functions declared local to a .c source file, and another color for functions declared globally like in a .h header file or linked file. User-functions are visually the same as all others, black text. Ugh.
If it's too much of a non-compiled linking challenge to apply, at least allow the user to select a section of working code text and change the font color by hand to get to the same place. Being able to change a text chunk background color would be great too. That would be of help to allow the programmer to, say, highlight sections of code that need later work, items for tomorrow, passing along working code to colleagues, etc.
