Customizing the source editor
To customize the source editor behaviour:
- Click Window > Preferences.
- Expand C/C++, and click C/C++ Editor.
- To set general preferences for the editor click the General tab.

- On the General Page set your preferences and click Apply. For a description of the General preferences click here.
- To customize the color of the text in the editable area of the editor, click the Colors tab.

- On the Colors page set your preferences and click Apply. For a description of the Color preferences click here.
- To customize Content Assist preferences, click the Content Assist tab. For more information, see Using Content Assist
- Click OK.