Use the Appearance panel of the Preferences window to customize the appearance of C elements in the viewers.
| Show translation unit numbers | Select this option to show translation unit numbers. |
| Group the includes in the C/C++ projects view | Select this option to group include files in the C/C++ project view. |
| Group the includes in the outliner | Select this option to group include files in outline views. |
| Group the namespaces in the outliner | Select this option to group files by namespaces in outline views. |
