# Appearance preferences

Use the Appearance panel of the Preferences window to customize the appearance of C elements in the viewers.

Appearance Options
Show translation unit members | Select this option to show translation unit members in Project Explorer and C/C++ Projects view.
Group include directives in Project Explorer and C/C++ Projects view | Select this option to group include directives in Project Explorer and C/C++ Projects view.
Group include directives in the Outline view | Select this option to group include directives in the Outline view.
Group namespaces in the Outline view | Select this option to group namespace declarations in the Outline view.
Sort header files before source files in Project Explorer and C/C++ Projects view | Select this option to separate header and source files in Project Explorer and C/C++ Projects view.