This website contains links to software which is either no longer maintained or will be supported only until the end of 2019 (CKFinder 2). For the latest documentation about current CKSource projects, including software like CKEditor 4/CKEditor 5, CKFinder 3, Cloud Services, Letters, Accessibility Checker, please visit the new documentation website.
If you look for an information about very old versions of CKEditor, FCKeditor and CKFinder check also the CKEditor forum, which was closed in 2015. If not, please head to StackOverflow for support.
The editor comes with a rich set of configurations that makes it possible to customize its appearance, features and behavior. The main configuration file is named "config.js". You can find this file in the root of the CKEditor installation folder.
All available configuration options can be found inside our API documentation, inside the CKEDITOR.config object definition.