# 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.
Show source roots at top of project | Select this option to reduce the number of targeted source roots, which can reduce indexing time on large projects. Deselecting this option allows for more targeted source roots (default). Source root folders are identified by the source root icon ().