Customize the appearance of C elements in viewers using the Appearance preference panel.
| Show translation unit numbers | Activate this checkbox to show translation unit numbers. |
| Group the includes in the C/C++ projects view | Activate this checkbox to group include files in the C/C++ project view. |
| Group the includes in the outliner | Activate this checkbox to group include files in outline views. |
| Group the namespaces in the outliner | Activate this checkbox to group files by namespaces in outline views. |
